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 formula for gravitational potential energy near the Earth's surface?

2. Which law of motion is crucial in understanding the forces acting on vehicles during acceleration and braking?

3. When a rocket accelerates upwards, according to Newton's third law, the rocket pushes against the exhaust gases and the exhaust gases push ________.

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

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

6. How does fluid friction differ from other types of frictional forces?

7. What is the formula for the pressure exerted by a gas in a container of volume at temperature and containing moles of gas?

8. 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?

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

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

11. Which formula represents the relationship between the work done by a constant force acting over a displacement in the direction of the force?

12. Why is Newton's third law of motion important in the study of collisions?

13. When a ball bounces off a wall, why does the ball experience a change in momentum?

14. If an object's velocity is doubled and its mass remains unchanged, how does its momentum change?

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

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

17. What happens if the mass of an object in circular motion increases?

18. In a billiard game, why does the cue ball slow down after colliding with another ball?

19. Which physical quantity does Newton's second law help calculate?

20. What is the formula for momentum?

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

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

23. 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?

24. Which aspect of Aristotle's ideas influenced the medieval understanding of celestial mechanics?

25. Which unit of mass is equivalent to 1000 grams?

26. Why are Newton's laws of motion considered fundamental in physics?

27. Which formula describes the relationship between buoyant force, density, volume displaced, and gravitational acceleration?

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

29. Which of the following is an example where tension force is involved?

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

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

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

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

4. What is the formula for the Doppler effect frequency observed when a source emitting frequency moves at velocity towards an observer?

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

6. Which physical quantity is represented by 'a' in the equation F = ma?

7. A block of mass 4 kg is pulled horizontally across a rough surface with a force of 20 N. If the coefficient of kinetic friction between the block and the surface is 0.3, what is the acceleration of the block?

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

9. In Newton's third law of motion, action and reaction forces always act on __________.

10. Which type of equilibrium describes an object at rest on a horizontal surface with no external forces acting on it?

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

12. Why does a passenger feel thrown forward when a bus suddenly stops?

13. Which law of motion describes the effect of applied force on an object's motion?

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

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

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

17. What principle describes the tendency of objects to resist changes in their state of motion?

18. What happens to an astronaut inside a spaceship traveling through deep space?

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

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. What did Aristotle propose as the cause of motion?

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

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

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

25. Which law of motion explains why a rocket moves upwards when gases are expelled downwards?

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

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

28. Why do astronauts experience weightlessness in space despite the presence of gravitational force?

29. Which formula represents the relationship between the angular velocity , linear velocity , and radius of rotation?

30. What is the direction of tension force in a taut rope or string?

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

32. How does a cyclist stay balanced while riding a bicycle?

33. How do Newton's laws of motion support the study of biomechanics?

34. What was a key criticism of Aristotle's theory of motion by medieval scholars influenced by Islamic philosophers?

35. What is the formula for the magnetic force on a charge moving with velocity in a magnetic field ?

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

37. When a person jumps off a stationary boat into the water, according to Newton's third law, how does the boat react?

38. Which of the following best represents Newton's first law of motion?

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

40. When catching a cricket ball, why do fielders pull their hands backward upon impact?

41. 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?

42. At what point does spring force become zero?

43. Which of the following is an example where impulse is crucial?

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

45. Which force is responsible for keeping an object in circular motion?

46. An object of mass 5 kg is moving with a constant velocity of 10 m/s. What is the net force acting on the object?

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

48. In a billiard game, why does the cue ball slow down after colliding with another ball?

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

50. 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?