Class 11 Physics — Chapter 5: Laws of Motion Online Test

1. What formula describes the relationship between power, work, and time?

2. A 2 kg block is initially at rest on a horizontal frictionless surface. If a horizontal force of 10 N is applied to the block, what is its velocity after 4 seconds?

3. A crate of mass 50 kg is pushed along a rough horizontal surface with a force of 200 N. If the coefficient of kinetic friction between the crate and the surface is 0.4, what is the acceleration of the crate?

4. What is an example of non-uniform circular motion?

5. What is the direction of centripetal force?

6. What is the relationship between centripetal force and centripetal acceleration?

7. When a force is applied to an object, what happens to the object's momentum?

8. Which statement correctly compares the magnitudes of static frictional force and kinetic frictional force between two surfaces?

9. What type of frictional force acts between two surfaces that are sliding past each other?

10. In a dynamic equilibrium situation, what happens if the forces acting on an object are not balanced?

11. In which of the following scenarios is an object in rotational equilibrium?

12. In a collision between a truck and a bicycle, which of the following statements is true about the total momentum before and after the collision?

13. When a person jumps off a boat into the water, how does the boat react according to the principle of conservation of linear momentum?

14. When a bird flies by flapping its wings, according to Newton's third law, what is the reaction force to the bird's wing movement?

15. When a person jumps off a boat onto a dock, according to Newton's third law, what is the reaction force to the person's jump?

16. What is the relationship between Newton and pound-force?

17. How did Aristotle's ideas influence Islamic scholars such as Ibn Sina (Avicenna) and Ibn Rushd (Averroes)?

18. According to Newton's first law of motion, what role does inertia play?

19. Why does a book placed on a table remain at rest until someone moves it?

20. Why does a ball thrown inside a moving train follow a curved path to an observer on the ground?

1. What allows a satellite to orbit Earth without falling?

2. A 50 kg person jumps with an acceleration of 5 m/s². What force does the ground exert on the person during the jump?

3. Which formula describes the relationship between wavelength, frequency, and wave speed?

4. What is the direction of tension force in a rope wrapped around a pulley system?

5. How does a bullet fired from a gun travel in a straight line after leaving the barrel?

6. Which concept did Johannes Kepler introduce to explain the motion of planets around the Sun, refuting Aristotle's geocentric model?

7. What is the relationship between centripetal force and the mass of an object in circular motion?

8. What is the formula for the magnitude of the angular momentum of a rotating body with moment of inertia and angular velocity ?

9. What causes a pendulum to swing back and forth without external force?

10. When a goalkeeper catches a fast-moving soccer ball, what happens to the goalkeeper and the ball according to Newton's third law?

11. Why does a passenger in a moving car tend to lean towards the opposite side when the car turns?

12. In which situation is a body in stable equilibrium?

13. Which force is responsible for the feeling of being pushed outward in a rotating vehicle?

14. Why is it challenging to observe true inertial frames of reference on Earth?

15. What type of frictional force acts between two surfaces that are sliding past each other?

16. What principle governs the motion of objects in a collision scenario, ensuring that total momentum remains unchanged?

17. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its:

18. What concept explains why an ice skater continues to glide forward even after stopping pushing?

19. When a spacecraft docks with the International Space Station (ISS), what principle ensures a safe approach and docking procedure?

20. How does Newton's third law of motion apply to swimming?

21. Which unit of force is based on the gravitational force acting on a mass of one kilogram?

22. What is the formula to calculate the gravitational force between two objects?

23. How do architects apply equilibrium principles to design cantilever structures?

24. Which formula represents the relationship between centripetal force , mass , radius of circular motion , and angular velocity ?

25. Which condition ensures rotational equilibrium for an object?

26. Which force allows an athlete to turn corners while running on a circular track?

27. Which scenario best represents an inertial frame of reference?

28. In a dynamic equilibrium situation, what happens if the forces acting on an object are not balanced?

29. What is the relationship between centripetal force and centrifugal force?

30. In which scenario is a body in unstable equilibrium?

1. Which force balances the centrifugal force in circular motion?

2. What is the relationship between Newton and dyne?

3. Why does a heavier object require more force to accelerate at the same rate as a lighter object?

4. What is the formula for the magnification of a lens with focal length when an object is placed at distance from the lens?

5. How did Aristotle's ideas on motion differ from later theories proposed by scientists like Galileo and Newton?

6. What is the SI unit of force?

7. Which formula represents the relationship between the half-life of a radioactive substance and its decay constant ?

8. During a collision between two objects, why is it important to extend the time of impact?

9. Which condition ensures rotational equilibrium for an object?

10. A hockey puck of mass 0.1 kg is pushed along a frictionless surface with a force of 5 N. What is the acceleration of the puck?

11. Why does a heavy object require more force to be moved than a lighter object?

12. What concept explains why an ice skater continues to glide forward even after stopping pushing?

13. Why is it important for architects to consider equilibrium principles in building design?

14. In which scenario is centripetal force necessary for maintaining circular motion?

15. For a body to be in translational equilibrium, which condition must be true?

16. Why does a passenger feel a backward jerk when a bus suddenly starts moving?

17. Why does a cyclist lean inwards while turning on a curved path?

18. A rocket of mass 2000 kg is initially at rest on the launch pad. If the rocket engines exert a constant force of 50,000 N, what is the acceleration of the rocket?

19. Which formula describes the relationship between impulse , force , and time over which the force acts?

20. When a person walks on the ground, according to Newton's third law, what is the reaction force to the person's foot pushing against the ground?

21. How do physicists use equilibrium principles in analyzing the stability of satellites in orbit?

22. Why does a football roll to a stop on a grass field?

23. How did Galileo's experiments contribute to the understanding of inertia?

24. What is spring force?

25. What force is required to accelerate a 1000 kg car at 2 m/s²?

26. What is the formula for the gravitational potential energy of an object of mass at height above the Earth's surface?

27. When a car collides with a wall, according to Newton's third law, what is the reaction force to the car's impact?

28. What is an applied force?

29. What is momentum defined as in physics?

30. When a person jumps off a diving board, according to Newton's third law, what is the reaction force to the person's push against the board?

31. What does the term "resolution of forces" refer to in mechanics problem-solving?

32. Which concept in Newton's laws explains why a ball continues to move after being kicked on a frictionless surface?

33. What is the formula for the electric field created by a point charge at a distance from it?

34. When a baseball player catches a ball, why does the player's body move backward?

35. When a person walks on a moving boat from bow to stern, how does the boat react according to Newton's third law?

36. What is the relationship between centripetal force and centrifugal force?

37. How does Newton's second law relate force to acceleration?

38. How does Newton's second law apply to the motion of a rocket in space?

39. Which formula describes the relationship between the wavelength of a wave, its frequency , and the speed of the wave?

40. If an object's mass is tripled and its velocity is halved, how does its momentum change?

41. Why does a cyclist need to pedal continuously to keep moving at a constant speed on a flat road?

42. How does Newton's second law relate to the concept of inertia?

43. What is the formula for the period of a simple pendulum of length swinging with small angles?

44. What happens to a soccer ball kicked on a frictionless surface with no gravity?

45. How did Aristotle explain the behavior of objects falling towards the Earth?

46. Which formula represents the relationship between centripetal force , mass , radius of circular motion , and angular velocity ?

47. A rocket of mass 1000 kg is accelerating upwards at 20 m/s². What is the force exerted by its engines?

48. What happens to the gravitational force between two objects if their masses are doubled while keeping the distance between them constant?

49. Which factor does not affect the magnitude of static friction between two surfaces?

50. Which of Aristotle's ideas influenced medieval European thought on motion and mechanics?