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 is the angular velocity of an object in circular motion?

2. What is spring force?

3. Which condition must be met for an elevator to represent an inertial frame of reference?

4. Which scientist formulated the laws of motion and universal gravitation, further refuting Aristotle's theories on motion and celestial mechanics?

5. What did Galileo argue against in his discussion of inertia?

6. What does the principle of conservation of linear momentum state?

7. What type of motion does a spinning top exhibit?

8. Which step involves considering the constraints or conditions given in the problem statement in mechanics problem-solving?

9. What is the SI unit of force?

10. Why does a tennis ball bounce back after hitting a wall?

11. What does represent in Newton's laws of motion?

12. How does the direction of applied force affect the motion of an object?

13. What happens if the radius of the circular path decreases in circular motion?

14. Which formula describes the relationship between the current flowing through a conductor, the charge passing through it in time , and the number of charge carriers ?

15. In Newton's third law, what is meant by "equal and opposite" forces?

16. A rocket moves upwards in space due to the expulsion of gases downwards. Which law of motion explains this?

17. What does Newton's first law of motion state regarding inertia?

18. What is the importance of reviewing and verifying each step in mechanics problem-solving?

19. Which physical quantity is used to measure tension force?

20. A box of mass 5 kg is placed on an inclined plane that makes an angle of 30 degrees with the horizontal. If the coefficient of friction between the box and the plane is 0.4, what is the acceleration of the box down the plane when a force of 30 N is applied parallel to the plane?

21. Why does a spinning top remain upright and spin for a long time?

22. In which scenario would rolling friction typically be encountered?

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

24. Why does a car skid when suddenly turning on a wet road?

25. When a cannon fires a cannonball, according to Newton's third law, how does the cannon recoil?

26. What is the formula for the electric field generated by a point charge at a distance from the charge?

27. Which physical quantity remains constant in uniform circular motion?

28. How did Aristotle's ideas on motion impact early European universities?

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

30. What is the formula for the centripetal acceleration of an object moving in a circle of radius with constant speed ?

1. Which unit of mass is commonly used in the context of atomic and molecular scales?

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

3. Why is it essential for car manufacturers to consider the conservation of momentum in designing crumple zones?

4. In Newton's third law, what is meant by "equal and opposite" forces?

5. What term did Galileo use to describe the tendency of objects to resist changes in their motion?

6. Which of the following best demonstrates inertia in action?

7. What is the formula for the escape velocity required for an object of mass to escape the gravitational pull of a celestial body of mass and radius ?

8. What happens to the motion of an object when an applied force is greater than opposing forces like friction?

9. How does an airplane flying at a constant speed relate to inertial frames of reference?

10. In a rocket launch, according to Newton's third law, what is the reaction force to the expulsion of exhaust gases?

11. What did Aristotle propose as the cause of motion?

12. What happens when a ball is thrown straight up into the air?

13. In a rocket launch, when the rocket engine ignites, according to Newton's third law, what is the reaction force?

14. What is the angular velocity of an object in circular motion?

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

16. Which formula describes the relationship between angular velocity, linear velocity, and radius of rotation?

17. Why does a pendulum swinging back and forth demonstrate dynamic equilibrium?

18. Which formula represents the relationship between the torque applied to a rigid body, its moment of inertia , and angular acceleration ?

19. Which concept from Aristotle's physics was criticized for its lack of empirical evidence by later Renaissance scientists?

20. What force enables a magnet to attract iron filings?

21. In which type of equilibrium do all forces and torques acting on an object balance each other at rest?

22. In an elastic collision between two objects, which of the following is conserved?

23. When a cannon fires a cannonball, according to Newton's third law, what is the reaction force to the force exerted on the cannonball?

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

25. What did Aristotle propose as the cause of the motion of the planets?

26. According to Newton's third law of motion, for every action, there is an equal and opposite:

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

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

29. How does Newton's second law allow scientists to predict the motion of objects?

30. A ball of mass 0.2 kg is thrown vertically upwards with an initial velocity of 20 m/s. What is the acceleration of the ball just after it is thrown?

31. Which condition ensures rotational equilibrium for an object?

32. Which law of motion states that for every action, there is an equal and opposite reaction?

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

34. In which situation would tension force be zero?

35. Which law of motion states that forces always occur in pairs and act on different objects simultaneously?

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

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

38. What happens to a satellite orbiting the Earth when there is no external force acting on it?

39. How do biomechanical engineers use equilibrium principles to design prosthetic limbs?

40. Which of the following is an example of inertia in everyday life?

41. How does Newton's second law explain the motion of a car accelerating from rest?

42. What principle does Newton's second law extend from Newton's first law?

43. Why does a ball thrown vertically into the air eventually fall back down?

44. What does Newton's first law of motion state regarding inertia?

45. 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?

46. Which force allows a person to hear sound waves?

47. A box of mass 5 kg is placed on an inclined plane that makes an angle of 30 degrees with the horizontal. If the coefficient of friction between the box and the plane is 0.4, what is the acceleration of the box down the plane when a force of 30 N is applied parallel to the plane?

48. What is the SI unit of gravitational constant ?

49. Which of the following quantities is momentum related to?

50. Which formula defines the relationship between force, mass, and acceleration?