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. Which law of motion describes the relationship between action and reaction forces?

2. Which law of motion directly addresses the concept of inertia?

3. In the context of physics, what does inertia primarily refer to?

4. Why does a car traveling on a straight road at a constant speed not require continuous acceleration?

5. Why are Newton's laws of motion considered classical mechanics?

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

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

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

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

10. If a force of 20 N is applied to an object with an acceleration of 4 m/s², what is the mass of the object?

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

12. Which Renaissance scientist criticized Aristotle's ideas on motion and emphasized experimental methods?

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

14. 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?

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

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

17. How did Aristotle's ideas on motion influence early Christian theologians?

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

19. Which formula describes the relationship between the Doppler effect, the frequency of the observed wave, the frequency of the source, the speed of sound , and the relative velocity ?

20. What happens to the acceleration of an object if the force acting on it is increased while its mass remains constant?

21. Which force is considered a fictitious or pseudo-force?

22. How does tension force change in a rope carrying a load when the rope is at rest?

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. What phenomenon occurs due to gravitational force that determines the orbits of planets around the Sun?

25. How does a rocket move through space after its engines shut off?

26. In biomechanics, how are equilibrium principles applied to analyze human posture?

27. What is an applied force?

28. Why does a coin placed on a spinning record move outward towards the edge as the record spins faster?

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

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

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

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

3. According to Aristotle, why do objects on Earth come to rest when no external forces are applied?

4. When a person stands still on a scale, what does the scale measure?

5. What is the SI unit of applied force?

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

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

8. What is an applied force?

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

10. What is the formula for elastic potential energy?

11. How does Newton's first law of motion relate to the motion of planets in the solar system?

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

13. Which formula describes the relationship between the Doppler effect, the frequency of the observed wave, the frequency of the source, the speed of sound , and the relative velocity ?

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

15. Why does a tightrope walker constantly adjust their position while walking?

16. What is the formula for the angular frequency of a simple harmonic oscillator with spring constant and mass ?

17. Which principle of physics explains why passengers feel pushed backward when a car suddenly accelerates?

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

19. Which of the following is an example of an applied force?

20. A force of 20 N is applied to an object of mass 4 kg. What is the resulting acceleration?

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

22. How does a gymnast on a balance beam maintain equilibrium during a routine?

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

24. What happens to a spacecraft in deep space where there are no external forces?

25. When a soccer player kicks a ball, according to Newton's third law, what is the reaction force to the player's kick?

26. Which amusement park ride demonstrates circular motion?

27. What allows a satellite in orbit around Earth to maintain a stable trajectory?

28. According to Newton, what is required to change the state of motion of an object?

29. 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?

30. What does Newton's second law of motion state?

31. 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?

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

33. How do engineers apply equilibrium principles in bridge design?

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

35. What concept explains why passengers feel thrown forward when a car suddenly accelerates?

36. What is the direction of spring force when a spring is compressed?

37. How did Galileo contribute to the understanding of inertia in relation to falling bodies?

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

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

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

41. What did Galileo's inclined plane experiments demonstrate about inertia?

42. Why does a satellite orbiting Earth maintain dynamic equilibrium?

43. In a closed system where no external forces are present, what happens to the total momentum before and after a collision between two objects?

44. What is spring force?

45. Which formula describes the relationship between the force exerted by an ideal gas, its pressure , and volume ?

46. What is the formula for the Lorentz force on a charged particle with charge , velocity , and experiencing a magnetic field ?

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

48. In a closed system where no external forces are present, what happens to the total momentum before and after a collision between two objects?

49. What is the formula for angular momentum?

50. 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 ?