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. When does an object have the greatest momentum?

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

3. If a ball collides with a wall and bounces back with the same speed, what can be said about the momentum exchange with the wall?

4. In a spring-mass system, what determines the acceleration of the mass?

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

6. A 2 kg block is pushed along a horizontal surface with a force of 10 N. If the coefficient of kinetic friction between the block and the surface is 0.2, what is the acceleration of the block?

7. Which law of motion explains why a goalkeeper dives to catch a football?

8. Which condition ensures rotational equilibrium for an object?

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

10. What is the purpose of drawing a free-body diagram in mechanics problems?

11. Which factor affects the magnitude of centripetal force required for circular motion?

12. When a rocket engine ejects exhaust gases downwards, according to Newton's third law, what is the reaction force to the downward ejection?

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

14. What happens to a ball rolling on a horizontal surface when no external force acts on it?

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

16. Why does a block placed on a flat surface remain stationary?

17. When a hockey player hits a puck with a stick, according to Newton's third law, what is the reaction force to the player's hit?

18. A 0.5 kg ball is thrown vertically upwards with an initial velocity of 10 m/s. What is the maximum height reached by the ball? (Assume g = 10 m/s²)

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

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

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

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

23. When a car travels at a constant speed along a straight road, what type of equilibrium does it maintain?

24. Which statement best describes the relationship between kinetic frictional force and the normal force between two surfaces?

25. Which of the following equations represents the relationship between impulse and change in momentum?

26. Which formula represents the relationship between the electric potential energy of a point charge and the electric potential at a distance from the charge?

27. How do Newton's laws of motion contribute to engineering and technology?

28. What formula relates torque, force, and lever arm length?

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

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

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

2. 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 ?

3. Which law of motion is crucial in understanding the principles behind rocket propulsion?

4. Which formula describes the relationship between work , force , and displacement in the direction of the force?

5. What concept explains why passengers feel pushed forward when a moving car suddenly stops?

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

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

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

9. What is the formula for Newton's First Law of Motion?

10. Which concept did Descartes introduce to explain motion and the behavior of matter, challenging Aristotle's ideas?

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

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

13. When a swimmer pushes against the water with their hands, according to Newton's third law, what is the reaction force?

14. Why does a paper airplane gradually slow down and fall to the ground after being thrown?

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

16. Why is it difficult to start pushing a heavy object that is at rest?

17. What is the formula for pressure exerted by a force over an area ?

18. Why does a cannon recoil backward when it fires a cannonball?

19. What is the formula for the moment of inertia of a thin rod of length and mass rotating about an axis perpendicular to its length and passing through its center?

20. Which physical quantity is used to measure spring force?

21. What is the formula for the power dissipated in an electrical resistor carrying current ?

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

23. What is the formula for Newton's Third Law of Motion?

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

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

26. When a hockey player hits a puck with a stick, according to Newton's third law, what is the reaction force to the player's hit?

27. What provides the centripetal force for a car turning around a curve on a road?

28. When a person pushes a heavy box along the floor, according to Newton's third law, what is the reaction force to the person's push?

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

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

31. During a collision between two billiard balls on a frictionless table, what remains constant throughout the collision process?

32. Why is kinetic frictional force sometimes referred to as sliding friction?

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

34. Why does a ball rolling on a smooth surface eventually come to a stop?

35. Which formula describes the relationship between acceleration due to gravity, mass, and weight?

36. Which force is responsible for objects falling to the ground?

37. When you push a heavy box across the floor, according to Newton's third law, the box exerts a reaction force __________.

38. What is the relationship between period and frequency in circular motion?

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

40. Which force causes a stone tied to a string to move in a circular path when swung around?

41. What concept from Aristotle's physics influenced medieval European scholars in their study of motion?

42. Which formula describes the relationship between the moment of inertia , mass , and radius of gyration of a body?

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

44. During a collision between two billiard balls on a table, what remains unchanged if no external forces are present?

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

46. What concept did Newton introduce that fundamentally challenged Aristotle's view of motion?

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

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

49. In which situation would tension force be zero?

50. Which formula represents the relationship between momentum , mass , and velocity ?