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101. What is the difference between path length and distance traveled?
ⓐ. They are synonyms and mean the same thing
ⓑ. Path length is always greater than distance traveled
ⓒ. Distance traveled is always greater than path length
ⓓ. Path length includes the distance traveled plus any retracing of the path
Correct Answer: They are synonyms and mean the same thing
Explanation: In standard kinematics, distance traveled is the same as path length—the total length of the actual path taken, including any back-and-forth motion. Displacement, in contrast, is the straight-line change in position between initial and final points.
102. How is path length typically calculated?
ⓐ. By subtracting initial position from final position
ⓑ. By integrating the speed (magnitude of velocity) over time
ⓒ. By multiplying speed by time
ⓓ. By dividing displacement by time
Correct Answer: By integrating the speed (magnitude of velocity) over time
Explanation: In general, path length $L$ is
$$
L=\int_{t_0}^{t_1}\!\bigl|\,\mathbf{v}(t)\,\bigr|\,dt,
$$
i.e., the time–integral of speed. Option C works only for constant speed.
103. Which term describes the total length of the actual path covered by an object?
ⓐ. Displacement
ⓑ. Distance traveled
ⓒ. Velocity
ⓓ. Acceleration
Correct Answer: Distance traveled
Explanation: Distance traveled refers to the total length of the path actually covered by an object, irrespective of its direction or retracing of the path.
104. In which scenario would the path length be equal to the distance traveled?
ⓐ. An object moving in a straight line away from its starting point
ⓑ. An object moving in a circular path
ⓒ. An object moving back and forth along the same straight line
ⓓ. An object moving in a zigzag pattern
Correct Answer: An object moving in a straight line away from its starting point
Explanation: If an object moves in a straight line away from its starting point and does not retrace its path, the path length and distance traveled will be equal.
105. How is path length typically calculated?
ⓐ. By subtracting initial position from final position
ⓑ. By integrating velocity over time
ⓒ. By multiplying speed by time
ⓓ. By dividing displacement by time
Correct Answer: By integrating velocity over time
Explanation: Path length is typically calculated by multiplying the speed (or magnitude of velocity) by the total time over which the object moves.
106. Which of the following is a scalar quantity related to distance traveled?
ⓐ. Velocity
ⓑ. Displacement
ⓒ. Speed
ⓓ. Acceleration
Correct Answer: Speed
Explanation: Speed is a scalar quantity that represents how fast an object is moving over a distance, without regard to direction.
107. If an object moves from point A to point B along a curved path and then returns to point A along the same path, what is its displacement?
ⓐ. Zero
ⓑ. The distance from A to B
ⓒ. Half the distance from A to B
ⓓ. Twice the distance from A to B
Correct Answer: Zero
Explanation: Displacement is the change in position of an object from its initial to its final position. If the object returns to its starting point along the same path, its displacement is zero.
108. Which quantity describes the straight-line distance between an object’s initial and final positions?
ⓐ. Path length
ⓑ. Speed
ⓒ. Displacement
ⓓ. Acceleration
Correct Answer: Displacement
Explanation: Displacement is the straight-line distance and direction between an object’s initial and final positions. It considers only the initial and final positions, not the actual path taken.
109. What is the relationship between distance traveled and path length in general?
ⓐ. They are always equal
ⓑ. Distance traveled is always greater than path length
ⓒ. Path length is always greater than distance traveled
ⓓ. Their relationship depends on the shape of the path
Correct Answer: They are always equal
Explanation: Distance traveled equals path length by definition—the total length of the actual route taken. (Do not confuse this with displacement, which can be smaller.)
110. Which term best describes the total length of the actual path an object takes, regardless of direction?
ⓐ. Distance traveled
ⓑ. Displacement
ⓒ. Speed
ⓓ. Acceleration
Correct Answer: Distance traveled
Explanation: Distance traveled refers to the total length of the actual path an object takes, irrespective of its direction or retracing of the path.
111. Which of the following quantities has magnitude but no direction?
ⓐ. Scalar quantity
ⓑ. Vector quantity
ⓒ. Displacement
ⓓ. Speed
Correct Answer: Scalar quantity
Explanation: Scalar quantities have magnitude (numerical value) but no direction associated with them. Examples include mass, speed, and temperature.
112. Which term describes a quantity that has both magnitude and direction?
ⓐ. Scalar quantity
ⓑ. Vector quantity
ⓒ. Distance
ⓓ. Speed
Correct Answer: Vector quantity
Explanation: Vector quantities have both magnitude (numerical value) and direction associated with them. Examples include displacement, velocity, and force.
113. If an object travels 5 meters north and then 3 meters south, what is its total displacement?
ⓐ. 8 meters
ⓑ. -8 meters
ⓒ. 2 meters north
ⓓ. -2 meters
Correct Answer: 2 meters north
Explanation: Taking north as positive, displacement $= +5\text{ m} + (-3\text{ m})=+2\text{ m}$ (i.e., 2 m north). Distance traveled (path length) would be $5+3=8$ m.
114. Which statement best describes the relationship between distance and displacement?
ⓐ. Distance is a vector quantity, while displacement is a scalar quantity
ⓑ. Distance is always greater than or equal to displacement
ⓒ. Displacement includes the total path length traveled
ⓓ. Distance and displacement are equal in all scenarios
Correct Answer: Distance is always greater than or equal to displacement
Explanation: Distance (path length) is the total length of the trajectory; displacement is the straight-line separation. By triangle inequality, distance $\ge$ $|\text{displacement}|$, with equality for straight-line motion without retracing.
115. What is the SI unit of average speed?
ⓐ. Meter per second
ⓑ. Meter
ⓒ. Kilometer per hour
ⓓ. Second
Correct Answer: Meter per second
Explanation: The SI unit of speed (and average speed) is $\text{m s}^{-1}$. While km/h is common in daily life, it is not the SI unit.
116. If a runner covers 5 kilometers in 25 minutes, what is the average speed in meters per second?
ⓐ. 3.33 m/s
ⓑ. 6 m/s
ⓒ. 7 m/s
ⓓ. 8 m/s
Correct Answer: 3.33 m/s
Explanation: $5\text{ km}=5000\text{ m}$, $25\text{ min}=1500\text{ s}$.
$$
\bar v=\frac{5000}{1500}\approx 3.33\ \text{m s}^{-1}.
$$
117. If an object moves 10 meters to the east and then 5 meters to the west, what is its total displacement?
ⓐ. 15 meters east
ⓑ. 15 meters west
ⓒ. 5 meters east
ⓓ. 5 meters west
Correct Answer: 5 meters east
Explanation: Displacement is the difference between the final and initial positions in a straight line. Here, the object ends up 5 meters east of its starting point.
118. Which of the following quantities can be represented by a directed line segment?
ⓐ. Scalar quantity
ⓑ. Vector quantity
ⓒ. Speed
ⓓ. Time
Correct Answer: Vector quantity
Explanation: Vector quantities, such as displacement or velocity, are represented by directed line segments indicating both magnitude and direction.
119. Which quantity is used to describe the length of a vector?
ⓐ. Speed
ⓑ. Magnitude
ⓒ. Distance
ⓓ. Time
Correct Answer: Magnitude
Explanation: The magnitude of a vector is the length (or size) of the vector quantity, indicating its numerical value without considering its direction.
120. Which of the following best describes a scalar quantity?
ⓐ. It has magnitude and direction
ⓑ. It has magnitude but no direction
ⓒ. It has no magnitude but has direction
ⓓ. It has neither magnitude nor direction
Correct Answer: It has magnitude but no direction
Explanation: Scalar quantities have magnitude (numerical value) but do not have direction associated with them.
121. What is displacement in physics?
ⓐ. The total distance traveled by an object
ⓑ. The change in position of an object from its initial to its final position
ⓒ. The speed of an object in motion
ⓓ. The rate of change of velocity
Correct Answer: The change in position of an object from its initial to its final position
Explanation: Displacement in physics refers to the change in position of an object from its initial to its final position. It is a vector quantity.
122. How is displacement different from distance traveled?
ⓐ. Displacement includes only the straight-line distance
ⓑ. Distance traveled includes the shortest path between two points
ⓒ. Displacement includes all paths taken by an object
ⓓ. Distance traveled is always greater than displacement
Correct Answer: Displacement includes only the straight-line distance
Explanation: Displacement is the straight-line distance and direction from the initial to the final position of an object. Distance traveled includes the total path length taken by the object.
123. If an object moves 10 meters east and then 5 meters west, what is its displacement?
ⓐ. 15 meters west
ⓑ. 15 meters east
ⓒ. 5 meters west
ⓓ. 5 meters east
Correct Answer: 5 meters east
Explanation: Displacement is the difference between the final and initial positions in a straight line. Here, the object ends up 5 meters east of its starting point.
124. Which of the following correctly describes displacement?
ⓐ. It is a scalar quantity
ⓑ. It has only magnitude
ⓒ. It has magnitude and direction
ⓓ. It has no physical significance
Correct Answer: It has magnitude and direction
Explanation: Displacement is a vector quantity because it has both magnitude (the numerical value of the straight-line distance) and direction (from initial to final position).
125. What is the SI unit of displacement?
ⓐ. Meter per second
ⓑ. Meter
ⓒ. Meter per second squared
ⓓ. Kilogram
Correct Answer: Meter
Explanation: Displacement is measured in meters (m), which is the SI unit of length.
126. Which term best describes the shortest distance between an object’s initial and final positions?
ⓐ. Displacement
ⓑ. Distance traveled
ⓒ. Speed
ⓓ. Velocity
Correct Answer: Displacement
Explanation: Displacement is the shortest distance and direction from an object’s initial to its final position, regardless of the path taken.
127. In which scenario would displacement be zero?
ⓐ. An object moves in a straight line away from its starting point
ⓑ. An object moves back and forth along the same straight line
ⓒ. An object moves in a circular path
ⓓ. An object moves in a zigzag pattern
Correct Answer: An object moves back and forth along the same straight line
Explanation: Displacement is zero when an object returns to its starting point after moving back and forth along the same straight line.
128. What information does displacement provide?
ⓐ. Total path length
ⓑ. Direction of motion
ⓒ. Speed of an object
ⓓ. Shape of the path
Correct Answer: Direction of motion
Explanation: Displacement provides information about both the distance and direction an object has moved from its initial to its final position.
129. If an object moves 6 meters north and then 4 meters south, what is its displacement?
ⓐ. 2 meters north
ⓑ. 10 meters north
ⓒ. 2 meters south
ⓓ. 10 meters south
Correct Answer: 2 meters north
Explanation: Displacement is the difference between the final and initial positions in a straight line. Here, the object ends up 2 meters north of its starting point.
130. Which quantity is displacement related to?
ⓐ. Speed
ⓑ. Distance
ⓒ. Time
ⓓ. Acceleration
Correct Answer: Distance
Explanation: Displacement is related to distance because both quantities involve measuring the extent of movement. However, displacement specifically refers to the change in position, while distance refers to the total path length traveled.
131. What is the fundamental difference between distance and displacement?
ⓐ. Distance is a scalar quantity, while displacement is a vector quantity
ⓑ. Distance is always greater than displacement
ⓒ. Displacement includes direction, while distance does not
ⓓ. Displacement includes retracing of paths, while distance does not
Correct Answer: Distance is a scalar quantity, while displacement is a vector quantity
Explanation: Distance is a scalar quantity that measures the total path length traveled, whereas displacement is a vector quantity that measures the change in position from the initial to the final point.
132. Which quantity considers the actual path taken by an object?
ⓐ. Distance
ⓑ. Displacement
ⓒ. Speed
ⓓ. Velocity
Correct Answer: Distance
Explanation: Distance considers the total path length taken by an object, including any retracing or changes in direction.
133. If an object moves 10 meters north, then 5 meters south, and finally 3 meters north, what is its total displacement?
ⓐ. 8 meters south
ⓑ. 8 meters north
ⓒ. 2 meters south
ⓓ. 2 meters north
Correct Answer: 2 meters north
Explanation: Displacement is the straight-line distance and direction from the initial to the final position. Here, the object ends up 2 meters north of its starting point.
134. Which of the following is a correct statement regarding distance and displacement?
ⓐ. Distance is always equal to displacement
ⓑ. Distance is a vector quantity, while displacement is a scalar quantity
ⓒ. Displacement can be negative, while distance cannot be negative
ⓓ. Displacement is always greater than distance
Correct Answer: Displacement can be negative, while distance cannot be negative
Explanation: Displacement can be positive, negative, or zero, depending on the direction of motion. Distance, on the other hand, is always positive or zero.
135. In which scenario would distance and displacement be equal?
ⓐ. An object moves in a straight line away from its starting point
ⓑ. An object moves back and forth along the same straight line
ⓒ. An object moves in a circular path
ⓓ. An object moves in a zigzag pattern
Correct Answer: An object moves in a straight line away from its starting point
Explanation: Distance and displacement are equal when an object moves in a straight line away from its starting point without retracing its path.
136. What does displacement measure?
ⓐ. The total path length traveled
ⓑ. The shortest distance between two points
ⓒ. The change in position from the initial to the final point
ⓓ. The speed of an object in motion
Correct Answer: The change in position from the initial to the final point
Explanation: Displacement measures the straight-line distance and direction between an object’s initial and final positions.
137. Which quantity represents the total path length traveled by an object?
ⓐ. Displacement
ⓑ. Speed
ⓒ. Distance
ⓓ. Acceleration
Correct Answer: Distance
Explanation: Distance represents the total length of the path traveled by an object, including any retracing or changes in direction.
138. If an object moves 8 meters east, then 4 meters west, and finally 2 meters east, what is its total displacement?
ⓐ. 2 meters east
ⓑ. 2 meters west
ⓒ. 10 meters east
ⓓ. 10 meters west
Correct Answer: 2 meters east
Explanation: Displacement is the straight-line distance and direction from the initial to the final position. Here, the object ends up 2 meters east of its starting point.
139. Which term refers to the shortest distance between an object’s initial and final positions?
ⓐ. Distance
ⓑ. Displacement
ⓒ. Speed
ⓓ. Velocity
Correct Answer: Displacement
Explanation: Displacement is the straight-line distance and direction from an object’s initial to its final position, representing the shortest path between the two points.
140. Which statement best describes the relationship between distance and displacement?
ⓐ. Distance is a vector quantity, while displacement is a scalar quantity
ⓑ. Distance is always greater than displacement
ⓒ. Displacement includes the total path length traveled
ⓓ. Distance and displacement are equal in all scenarios
Correct Answer: Distance is always greater than displacement
Explanation: Distance represents the total length of the actual path traveled by an object, which is always greater than or equal to its displacement. Displacement, on the other hand, is the straight-line distance and direction between the initial and final positions.
141. What is average speed in physics?
ⓐ. The total distance traveled divided by the total time taken
ⓑ. The change in position divided by the change in time
ⓒ. The instantaneous speed at a specific moment
ⓓ. The acceleration of an object
Correct Answer: The total distance traveled divided by the total time taken
Explanation: Average speed is calculated as the total distance traveled divided by the total time taken to cover that distance.
142. How is average speed different from instantaneous speed?
ⓐ. Average speed is always greater than instantaneous speed
ⓑ. Average speed is the speed at a specific moment
ⓒ. Average speed is the total distance divided by total time, while instantaneous speed is the speed at any given instant
ⓓ. Average speed includes direction, while instantaneous speed does not
Correct Answer: Average speed is the total distance divided by total time, while instantaneous speed is the speed at any given instant
Explanation: Average speed gives the overall rate of motion over a distance, while instantaneous speed measures the speed at a particular moment in time.
143. If a car travels 120 kilometers in 2 hours, what is its average speed?
ⓐ. 60 km/h
ⓑ. 80 km/h
ⓒ. 100 km/h
ⓓ. 120 km/h
Correct Answer: 60 km/h
Explanation: Average speed = Total distance / Total time = 120 km / 2 hours = 60 km/h.
144. Which quantity is used to describe how fast an object moves over a given distance?
ⓐ. Acceleration
ⓑ. Velocity
ⓒ. Average speed
ⓓ. Displacement
Correct Answer: Average speed
Explanation: Average speed measures how fast an object moves over a given distance, calculated as total distance divided by total time.
145. What is the SI unit of average speed?
ⓐ. Meter per second
ⓑ. Meter
ⓒ. Kilometer per hour
ⓓ. Second
Correct Answer: Meter per second
Explanation: The SI unit of speed (and average speed) is $\mathrm{m\,s^{-1}}$. Units like km/h are common in daily life but are not SI.
146. Which of the following scenarios represents average speed?
ⓐ. A car accelerates from 0 to 100 km/h in 10 seconds
ⓑ. A runner completes a 400-meter race in 50 seconds
ⓒ. A cyclist travels 20 kilometers in 1 hour
ⓓ. A train travels 200 kilometers in 2 hours
Correct Answer: A cyclist travels 20 kilometers in 1 hour
Explanation: Average speed is calculated as total distance divided by total time taken to cover that distance.
147. If a runner covers 5 kilometers in 25 minutes, what is the average speed in meters per second?
ⓐ. 5 m/s
ⓑ. 6.6 m/s
ⓒ. 7 m/s
ⓓ. 3.3 m/s
Correct Answer: 3.3 m/s
Explanation: Convert 5 kilometers to meters (5000 meters) and 25 minutes to seconds (1500 seconds). Average speed = 5000 m / 1500 s = 3.3 m/s.
148. Which term describes the total distance traveled divided by the total time taken?
ⓐ. Acceleration
ⓑ. Velocity
ⓒ. Instantaneous speed
ⓓ. Average speed
Correct Answer: Average speed
Explanation: Average speed is defined as the total distance traveled divided by the total time taken to cover that distance.
149. If a cyclist covers 30 kilometers in 2 hours, what is the average speed in kilometers per hour?
ⓐ. 15 km/h
ⓑ. 20 km/h
ⓒ. 25 km/h
ⓓ. 30 km/h
Correct Answer: 15 km/h
Explanation: Average speed = Total distance / Total time = 30 km / 2 hours = 15 km/h.
150. Which quantity is calculated as the ratio of total distance traveled to total time taken?
ⓐ. Average speed
ⓑ. Velocity
ⓒ. Acceleration
ⓓ. Displacement
Correct Answer: Average speed
Explanation: Average speed is calculated by dividing the total distance traveled by the total time taken to cover that distance.
151. What is average velocity in physics?
ⓐ. The total displacement divided by the total time taken
ⓑ. The total distance divided by the total time taken
ⓒ. The change in position divided by the change in time
ⓓ. The instantaneous velocity at a specific moment
Correct Answer: The total displacement divided by the total time taken
Explanation: Average velocity is calculated as the total displacement divided by the total time taken to cover that displacement.
152. How is average velocity different from average speed?
ⓐ. Average velocity is always greater than average speed
ⓑ. Average velocity is a scalar quantity, while average speed is a vector quantity
ⓒ. Average velocity includes direction, while average speed does not
ⓓ. Average velocity is the speed at a specific moment
Correct Answer: Average velocity includes direction, while average speed does not
Explanation: Average velocity includes direction and is calculated using displacement, while average speed is scalar and is calculated using total distance traveled.
153. If a car travels 100 kilometers north in 2 hours, what is its average velocity?
ⓐ. 50 km/h north
ⓑ. 50 km/h south
ⓒ. 100 km/h north
ⓓ. 100 km/h south
Correct Answer: 50 km/h north
Explanation: Average velocity = Total displacement / Total time = 100 km north / 2 hours = 50 km/h north.
154. Which quantity represents the rate of change of position over a specific interval of time?
ⓐ. Average speed
ⓑ. Velocity
ⓒ. Acceleration
ⓓ. Distance
Correct Answer: Velocity
Explanation: Velocity is defined as the rate of change of position of an object over a specific interval of time, including both speed and direction.
155. What is the SI unit of average velocity?
ⓐ. Meter per second
ⓑ. Meter
ⓒ. Kilometer per hour
ⓓ. Second
Correct Answer: Meter per second
Explanation: Average velocity is typically measured in meters per second (m/s), which is the SI unit of velocity.
156. Which of the following scenarios represents average velocity?
ⓐ. A car accelerates from 0 to 100 km/h in 10 seconds
ⓑ. A runner completes a 400-meter race in 50 seconds
ⓒ. A cyclist travels 20 kilometers north in 1 hour
ⓓ. A train travels 200 kilometers in 2 hours
Correct Answer: A cyclist travels 20 kilometers north in 1 hour
Explanation: Average velocity is calculated as the total displacement divided by the total time taken to cover that displacement.
157. If an object moves 5 meters east, then 3 meters west, what is its total displacement and average velocity?
ⓐ. Displacement = 2 meters east; Average velocity = 2 m/s east
ⓑ. Displacement = 8 meters west; Average velocity = 4 m/s west
ⓒ. Displacement = 8 meters east; Average velocity = 4 m/s east
ⓓ. Displacement = 2 meters east; Average velocity cannot be determined without the total time
Correct Answer: Displacement = 2 meters east; Average velocity cannot be determined without the total time
Explanation: Displacement $=2$ m east. Average velocity is $\Delta \mathbf{r}/\Delta t$, so without $\Delta t$ you cannot compute its magnitude.
158. If a car moves with a constant speed of 60 km/h, what is its velocity?
ⓐ. 60 km/h
ⓑ. 60 km/h north
ⓒ. 60 km/h south
ⓓ. Cannot be determined without specifying direction
Correct Answer: Cannot be determined without specifying direction
Explanation: Velocity is a vector; you need magnitude and direction. Speed alone (60 km/h) is insufficient.
159. If a car travels at a constant speed of 80 km/h, what is its velocity?
ⓐ. 80 km/h
ⓑ. 80 km/h north
ⓒ. 80 km/h south
ⓓ. Cannot be determined without specifying direction
Correct Answer: Cannot be determined without specifying direction
Explanation: Velocity requires direction. Without it, only speed is known.
160. Which term describes the rate of change of position over a given distance?
ⓐ. Average speed
ⓑ. Velocity
ⓒ. Acceleration
ⓓ. Distance
Correct Answer: Average speed
Explanation: The wording “over a given distance” is misleading. The standard definition is rate of change of position with respect to time, i.e.
$$
\bar v=\frac{\text{total distance}}{\text{total time}}.
$$
Interpreting the intended meaning (with time), the correct term is average speed.
161. Which of the following quantities is scalar in nature?
ⓐ. Speed
ⓑ. Velocity
ⓒ. Acceleration
ⓓ. Displacement
Correct Answer: Speed
Explanation: Speed is a scalar quantity that represents the magnitude of motion without regard to direction.
162. What is the primary difference between speed and velocity?
ⓐ. Speed is always positive, while velocity can be negative
ⓑ. Speed includes direction, while velocity does not
ⓒ. Velocity is always greater than speed
ⓓ. Velocity includes direction, while speed does not
Correct Answer: Velocity includes direction, while speed does not
Explanation: Velocity is a vector quantity that includes both magnitude (speed) and direction of motion.
163. If a car moves with a constant speed of 60 km/h, what is its velocity?
ⓐ. 60 km/h
ⓑ. 60 km/h north
ⓒ. 60 km/h south
ⓓ. Wrong question
Correct Answer: Wrong question
Explanation: While the car’s speed is given as 60 km/h, its velocity cannot be determined without knowing the direction of travel. For example, the car could be moving at 60 km/h east, west, north, or south.
164. Which term represents the rate of change of position of an object in a specific direction?
ⓐ. Speed
ⓑ. Acceleration
ⓒ. Velocity
ⓓ. Distance
Correct Answer: Velocity
Explanation: Velocity is a vector quantity that describes the rate of change of position of an object in a specific direction.
165. If an object moves 20 meters east and then 10 meters west, what is its net displacement and average velocity?
ⓐ. Displacement = 30 meters east; Average velocity = 10 m/s east
ⓑ. Displacement = 10 meters west; Average velocity = 5 m/s west
ⓒ. Displacement = 10 meters east; Average velocity = 5 m/s east
ⓓ. Displacement = 10 m east; cannot be determined without time
Correct Answer: Displacement = 10 m east; cannot be determined without time
Explanation: The net displacement is 10 meters east. Without the time taken, the average velocity cannot be calculated. However, the average velocity’s direction would be east, matching the direction of the net displacement. Based on the options provided, option C correctly identifies the net displacement.
166. Which quantity measures the magnitude of motion regardless of direction?
ⓐ. Speed
ⓑ. Velocity
ⓒ. Acceleration
ⓓ. Displacement
Correct Answer: Speed
Explanation: Speed is a scalar quantity that measures the magnitude of motion without consideration of direction.
167. What does it mean if the velocity of an object is negative?
ⓐ. The object is stationary
ⓑ. The object is moving in the opposite direction to the chosen positive direction
ⓒ. The object is accelerating
ⓓ. The object’s speed is decreasing
Correct Answer: The object is moving in the opposite direction to the chosen positive direction
Explanation: A negative velocity indicates that the object is moving in the direction opposite to the chosen positive direction, if direction is specified.
168. If a car travels at a constant speed of 80 km/h, what is its velocity?
ⓐ. 80 km/h
ⓑ. 80 km/h north
ⓒ. 80 km/h south
ⓓ. None of them
Correct Answer: None of them
Explanation: Since the problem only provides the car’s speed and gives no information about its direction, its velocity cannot be determined. Options B and C are possible velocities, but they are not the only possibilities, and there is no information in the question to support them. Therefore, none of the provided options are definitively correct.
169. Which term describes the total displacement divided by the total time taken?
ⓐ. Average speed
ⓑ. Velocity
ⓒ. Instantaneous velocity
ⓓ. Average velocity
Correct Answer: Average velocity
Explanation: Average velocity is calculated as the total displacement divided by the total time taken to cover that displacement, including direction.
170. Which quantity is calculated as the ratio of total displacement to total time taken?
ⓐ. Average speed
ⓑ. Average Velocity
ⓒ. Acceleration
ⓓ. Distance
Correct Answer: Average Velocity
Explanation: Average Velocity is calculated by dividing the total displacement by the total time taken to cover that displacement, including both magnitude and direction.
171. How is average speed calculated?
ⓐ. Total displacement divided by total time
ⓑ. Total distance divided by total time
ⓒ. Total displacement multiplied by total time
ⓓ. Total distance multiplied by total time
Correct Answer: Total distance divided by total time
Explanation: Average speed is calculated as the total distance traveled divided by the total time taken to cover that distance.
172. If a car travels 240 kilometers in 4 hours, what is its average speed?
ⓐ. 60 km/h
ⓑ. 80 km/h
ⓒ. 100 km/h
ⓓ. 120 km/h
Correct Answer: 60 km/h
Explanation: Average speed = Total distance / Total time = 240 km / 4 hours = 60 km/h.
173. Which term describes the total distance traveled divided by the total time taken?
ⓐ. Velocity
ⓑ. Acceleration
ⓒ. Instantaneous speed
ⓓ. Average speed
Correct Answer: Average speed
Explanation: Average speed is calculated as the total distance traveled divided by the total time taken to cover that distance.
174. If a cyclist covers 50 kilometers in 2.5 hours, what is the average speed in kilometers per hour?
ⓐ. 15 km/h
ⓑ. 20 km/h
ⓒ. 25 km/h
ⓓ. 30 km/h
Correct Answer: 20 km/h
Explanation: Average speed = Total distance / Total time = 50 km / 2.5 hours = 20 km/h.
175. Which of the following is true about displacement?
ⓐ. It is always positive.
ⓑ. It is always greater than distance.
ⓒ. It can be zero even if distance is not zero.
ⓓ. It is equal to path length for every motion.
Correct Answer: It can be zero even if distance is not zero.
Explanation: If an object returns to its starting point, displacement = 0, but distance > 0.
176. If an object covers 400 meters in 20 seconds, what is its average speed in meters per second?
ⓐ. 10 m/s
ⓑ. 15 m/s
ⓒ. 20 m/s
ⓓ. 25 m/s
Correct Answer: 20 m/s
Explanation: Average speed = Total distance / Total time = 400 m / 20 s = 20 m/s.
177. Which term describes the rate of change of position over a given distance?
ⓐ. Average speed
ⓑ. Velocity
ⓒ. Acceleration
ⓓ. Distance
Correct Answer: Average speed
Explanation: Average speed measures the rate at which an object moves over a given distance.
178. If a swimmer covers 1.5 kilometers in 30 minutes, what is the average speed in kilometers per hour?
ⓐ. 1 km/h
ⓑ. 2 km/h
ⓒ. 3 km/h
ⓓ. 4 km/h
Correct Answer: 3 km/h
Explanation: Convert 1.5 kilometers to meters (1500 meters) and 30 minutes to hours (0.5 hours). Average speed = 1500 m / 0.5 h = 3000 m/h = 3 km/h.
179. Which quantity is used to describe how fast an object moves over a given distance?
ⓐ. Acceleration
ⓑ. Velocity
ⓒ. Average speed
ⓓ. Displacement
Correct Answer: Average speed
Explanation: Average speed is calculated as the total distance divided by the total time taken to cover that distance.
180. If a train travels 300 kilometers in 5 hours, what is its average speed in kilometers per hour?
ⓐ. 50 km/h
ⓑ. 60 km/h
ⓒ. 70 km/h
ⓓ. 80 km/h
Correct Answer: 60 km/h
Explanation: Average speed = Total distance / Total time = 300 km / 5 hours = 60 km/h.
181. How is average velocity calculated?
ⓐ. Total displacement divided by total time
ⓑ. Total distance divided by total time
ⓒ. Total displacement multiplied by total time
ⓓ. Total distance multiplied by total time
Correct Answer: Total displacement divided by total time
Explanation: Average velocity is calculated as the total displacement divided by the total time taken to cover that displacement.
182. If a car travels 120 kilometers north in 2 hours, and then 80 kilometers south in 1.5 hours, what is its average velocity?
ⓐ. ≈ 11.43 km/h north
ⓑ. 40 km/h south
ⓒ. 50 km/h north
ⓓ. 50 km/h south
Correct Answer: ≈ 11.43 km/h north
Explanation: Net displacement $=120-80=40$ km north; total time $=3.5$ h.
$$
\bar{\mathbf{v}}=\frac{40}{3.5}\approx 11.43\ \text{km h}^{-1}\ \text{north}.
$$
183. Which term describes the total displacement traveled divided by the total time taken?
ⓐ. Average speed
ⓑ. Velocity
ⓒ. Instantaneous velocity
ⓓ. Average velocity
Correct Answer: Average velocity
Explanation: Average velocity is calculated as the total displacement divided by the total time taken to cover that displacement, including direction.
184. If a cyclist covers 60 kilometers in 2 hours, what is the average velocity?
ⓐ. 20 km/h
ⓑ. 30 km/h
ⓒ. 40 km/h
ⓓ. 50 km/h
Correct Answer: 30 km/h
Explanation: Average velocity = Total displacement / Total time = 60 km / 2 hours = 30 km/h.
185. Which of the following scenarios represents average velocity?
ⓐ. A car accelerates from 0 to 100 km/h in 10 seconds
ⓑ. A runner completes a 400-meter race in 50 seconds
ⓒ. A cyclist travels 20 kilometers north in 1 hour
ⓓ. A train travels 200 kilometers in 2 hours
Correct Answer: A cyclist travels 20 kilometers north in 1 hour
Explanation: Average velocity is calculated as the total displacement divided by the total time taken to cover that displacement, including direction.
186. If an object moves 500 meters east and then 300 meters west, what is its net displacement and average velocity?
ⓐ. Displacement = 200 meters east; Average velocity = 100 m/s east
ⓑ. Displacement = 200 meters east; Average velocity cannot be determined without the total time
ⓒ. Displacement = 200 meters east; Average velocity = 100 m/s west
ⓓ. Displacement = 200 meters west; Average velocity = 100 m/s east
Correct Answer: Displacement = 200 meters east; Average velocity cannot be determined without the total time
Explanation: Net displacement $=500-300=200$ m east. Average velocity needs total time: $\bar{\mathbf{v}}=\Delta \mathbf{r}/\Delta t$.
187. In a velocity-time graph, how is instantaneous velocity calculated?
ⓐ. By reading the velocity value (ordinate) at that instant
ⓑ. By finding the area under the curve
ⓒ. By dividing total displacement by total time
ⓓ. By subtracting initial velocity from final velocity
Correct Answer: By reading the velocity value (ordinate) at that instant
Explanation: On a v–t graph, the y-value at time $t$ is the instantaneous velocity. The slope of a v–t graph gives acceleration.
188. Which quantity is essential for determining instantaneous velocity from a velocity-time graph?
ⓐ. The value on the vertical axis at the instant of interest
ⓑ. The area under the curve
ⓒ. Total displacement
ⓓ. Average velocity
Correct Answer: The value on the vertical axis at the instant of interest
Explanation: The vertical coordinate of a v–t graph at time $t$ is $v(t)$. (Area under a v–t graph gives displacement.)
189. In which situation is the acceleration negative?
ⓐ. A car slowing down uniformly on a straight road
ⓑ. A car accelerating from rest
ⓒ. A plane taking off
ⓓ. A rocket in space
Correct Answer: A car slowing down uniformly on a straight road
Explanation: With the forward direction chosen positive, slowing down corresponds to $a<0$ (deceleration). A ball rolling downhill speeds up (for downhill positive), hence $a>0$.
190. How is acceleration represented on a displacement-time graph?
ⓐ. By the second derivative of displacement with respect to time: $a=\dfrac{d^2 s}{dt^2}$
ⓑ. By the area under the curve
ⓒ. By the slope of the chord between two points
ⓓ. By the area above the curve
Correct Answer: By the second derivative of displacement with respect to time: $a=\dfrac{d^2 s}{dt^2}$
Explanation: On an $s$-$t$ graph, slope (first derivative) gives velocity, and curvature (second derivative) gives acceleration.
191. What is relative velocity?
ⓐ. Velocity of an object as measured relative to another object (frame)
ⓑ. Velocity relative to a moving observer
ⓒ. Velocity relative to the speed of light
ⓓ. Velocity relative to the center of the Earth
Correct Answer: Velocity of an object as measured relative to another object (frame)
Explanation: If object A has velocity $\mathbf{v}_A$ and object B has $\mathbf{v}_B$ (in the same ground frame), the velocity of A relative to B is $\mathbf{v}_{A/B}=\mathbf{v}_A-\mathbf{v}_B$.
192. If two cars are moving towards each other with velocities $v_1$ and $v_2$ respectively, what is their relative velocity?
ⓐ. $v_1 + v_2$
ⓑ. $|v_1 – v_2|$
ⓒ. $v_1 – v_2$
ⓓ. $\frac{v_1 + v_2}{2}$
Correct Answer: $v_1 + v_2$
Explanation: Taking magnitudes, approach speed is $v_1+v_2$. Vectorially, $\mathbf{v}_{1/2}=\mathbf{v}_1-\mathbf{v}_2$; when they head toward each other, the magnitudes add.
193. If a car moves eastward at 60 km/h and another moves westward at 40 km/h, what is their relative velocity?
ⓐ. 100 km/h eastward
ⓑ. 20 km/h westward
ⓒ. 100 km/h westward
ⓓ. 20 km/h eastward
Correct Answer: 100 km/h eastward
Explanation: Let east be $+$. Then $\mathbf{v}_A=+60$, $\mathbf{v}_B=-40$. $\mathbf{v}_{A/B}=\mathbf{v}_A-\mathbf{v}_B=+100$ km/h (east).
194. What is the relative velocity of a stationary observer with respect to a moving object?
ⓐ. It depends on the observer’s direction
ⓑ. It is the same as the object’s velocity
ⓒ. It equals the negative of the object’s velocity (same magnitude, opposite direction)
ⓓ. It is undefined
Correct Answer: It equals the negative of the object’s velocity (same magnitude, opposite direction)
Explanation: $\mathbf{v}_{\text{observer/object}}=\mathbf{v}_{\text{obs}}-\mathbf{v}_{\text{obj}}=\mathbf{0}-\mathbf{v}_{\text{obj}}=-\mathbf{v}_{\text{obj}}$.
195. In which scenario would relative velocity be zero?
ⓐ. Two objects moving in the same direction with equal speeds (same velocity)
ⓑ. Two objects moving in opposite directions
ⓒ. One object moving and the other stationary
ⓓ. One object moving and the other accelerating
Correct Answer: Two objects moving in the same direction with equal speeds (same velocity)
Explanation: If $\mathbf{v}_A=\mathbf{v}_B$, then $\mathbf{v}_{A/B}=\mathbf{v}_A-\mathbf{v}_B=\mathbf{0}$.
196. What is the relative velocity of a bird flying north at 20 m/s observed from an airplane flying south at 300 m/s?
ⓐ. 280 m/s south
ⓑ. 320 m/s south
ⓒ. 280 m/s north
ⓓ. 320 m/s north
Correct Answer: 320 m/s north
Explanation: Take north as $+$. $\mathbf{v}_{\text{bird}}=+20$, $\mathbf{v}_{\text{plane}}=-300$. $\mathbf{v}_{\text{bird/plane}}=20-(-300)=+320$ m/s (north).
197. In a race, a cyclist and a car are moving in the same direction. The car’s speed is 60 km/h and the cyclist’s speed is 25 km/h. What is the cyclist’s relative velocity with respect to the car?
ⓐ. 85 km/h
ⓑ. 35 km/h
ⓒ. 45 km/h
ⓓ. 55 km/h
Correct Answer: 35 km/h
Explanation: Relative speed (same direction) is $|25-60|=35$ km/h. Note: with these speeds the cyclist cannot actually overtake the car; the question is about the magnitude of relative velocity.
198. A swimmer is trying to cross a river flowing south at 2 m/s. If the swimmer swims northward at 4 m/s relative to the water, what is the swimmer’s velocity relative to the ground?
ⓐ. 2 m/s south
ⓑ. 6 m/s north
ⓒ. $\sqrt{(4\ \text{m/s})^2 + (2\ \text{m/s})^2}$ north
ⓓ. 2 m/s north
Correct Answer: 2 m/s north
Explanation: Velocities are colinear (opposite directions). Ground-frame velocity $=4-2=2$ m/s north. Vector addition reduces to $\pm$ subtraction here.
199. If a roller coaster reaches a maximum speed of 100 km/h during a free fall, what is this speed called?
ⓐ. Average speed
ⓑ. Terminal speed
ⓒ. Instantaneous speed
ⓓ. Constant speed
Correct Answer: Instantaneous speed
Explanation: The speed of the roller coaster at the precise moment it reaches 100 km/h is its instantaneous speed.
200. Which term describes the speed of an object at a particular instant of time?
ⓐ. Constant speed
ⓑ. Average speed
ⓒ. Instantaneous speed
ⓓ. Terminal speed
Correct Answer: Instantaneous speed
Explanation: Instantaneous speed is the speed of an object at a particular instant of time, not averaged over time.
This page covers Class 11 Physics MCQs – Chapter 3: Motion in a Straight Line (Part 2). Motion is one of the most essential topics in NCERT/CBSE Class 11 Physics and forms the foundation for board exams, JEE, NEET, and other competitive tests. The full chapter contains 350 multiple-choice questions with correct answers and explanations, neatly divided into 4 practice-friendly parts. Here in Part 2, you will find the next set of 100 MCQs with solutions to boost your speed and accuracy.
- 👉 This is Part 2 — 100 MCQs designed for concept strengthening.
- 👉 All questions are aligned with the NCERT/CBSE syllabus.
- 👉 If you need MCQs from other Class 11 chapters, different subjects, or classes, click the top navigation buttons.
- 👉 Continue through all 4 parts to complete 350 Motion in a Straight Line MCQs.