RRB Group D - Force and laws of motion Online Test (MCQ Quiz)

1. What is the SI unit of force?

A) Joule B) Watt C) Newton D) Pascal

2. Newton's first law of motion is also known as the law of:

A) Momentum B) Inertia C) Action and Reaction D) Energy

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

A) First Law B) Second Law C) Third Law D) Law of Conservation of Energy

4. The second law of motion relates force, mass, and:

A) Velocity B) Acceleration C) Momentum D) Energy

5. Which quantity is defined as the product of mass and velocity?

A) Force B) Acceleration C) Momentum D) Impulse

6. If no net force acts on an object, its velocity will:

A) Increase B) Decrease C) Remain constant D) Become zero

7. Inertia is the tendency of an object to:

A) Change its state of motion B) Resist changes in its state of motion C) Speed up when a force is applied D) Slow down when a force is applied

8. Which of the following has the most inertia?

A) A feather B) A car C) A bicycle D) A bowling ball

9. The rate of change of momentum of an object is directly proportional to the:

A) Mass of the object B) Velocity of the object C) Applied force D) Time for which the force is applied

10. The mathematical expression for Newton's second law of motion is:

A) F = m/a B) F = a/m C) F = ma D) F = m + a

11. Impulse is defined as the product of force and:

A) Mass B) Velocity C) Time interval D) Acceleration

12. Impulse is equal to the change in:

A) Kinetic energy B) Potential energy C) Momentum D) Angular momentum

13. When a bus suddenly starts moving, passengers tend to fall backward due to:

A) Inertia of motion B) Inertia of rest C) Centripetal force D) Centrifugal force

14. When a bus suddenly stops, passengers tend to fall forward due to:

A) Inertia of rest B) Inertia of motion C) Friction D) Gravitational force

15. A rocket works on the principle of which law of motion?

A) First Law B) Second Law C) Third Law D) Law of Gravitation

16. The SI unit of momentum is:

A) Newton-second B) Kilogram-meter per second C) Joule-second D) Newton-meter

17. If the mass of an object is doubled and the acceleration is halved, the force applied will:

A) Double B) Halve C) Remain the same D) Become four times

18. Which of the following is a vector quantity?

A) Mass B) Speed C) Force D) Distance

19. A body is at rest. What is the net force acting on it?

A) Zero B) Positive C) Negative D) Cannot be determined

20. If a force of 10 N acts on a mass of 5 kg, what is the acceleration produced?

A) 0.5 m/s² B) 2 m/s² C) 5 m/s² D) 50 m/s²

21. The product of force and the time for which it acts is equal to the change in:

A) Velocity B) Kinetic energy C) Momentum D) Angular momentum

22. A gun recoils when a bullet is fired. This is an example of:

A) Newton's First Law B) Newton's Second Law C) Newton's Third Law D) Conservation of Energy

23. Which law explains why seat belts are important in cars?

A) First Law B) Second Law C) Third Law D) Law of Conservation of Momentum

24. What is the unit of impulse in the SI system?

A) N m B) N s C) kg m/s² D) J s

25. When a person jumps off a boat, the boat moves backward. This illustrates:

A) Newton's First Law B) Newton's Second Law C) Newton's Third Law D) Principle of Buoyancy

26. The force required to change the state of motion of an object is given by Newton's:

A) First Law B) Second Law C) Third Law D) Law of Universal Gravitation

27. Which of the following is a non-contact force?

A) Friction B) Tension C) Gravitational force D) Normal force

28. A force is a push or a pull that tends to change or ____ the state of motion of an object.

A) Maintain B) Accelerate C) Resist D) Initiate

29. If the net force on an object is zero, the object is either at rest or moving with:

A) Uniform acceleration B) Variable acceleration C) Constant velocity D) Increasing speed

30. What is the unit of mass in the SI system?

A) Gram B) Kilogram C) Milligram D) Pound

31. What is the unit of acceleration in the SI system?

A) m/s B) m/s² C) m²/s D) kg m/s²

32. Which law states that momentum is conserved in a closed system?

A) Newton's First Law B) Newton's Second Law C) Newton's Third Law D) Law of Conservation of Energy

33. An object moving with constant velocity has a net force of:

A) Zero B) Positive C) Negative D) Equal to its mass

34. The property of matter by which it continues in its state of rest or uniform motion in a straight line, unless acted upon by an external force, is called:

A) Momentum B) Inertia C) Acceleration D) Force

35. If a force of 20 N is applied to a 10 kg object for 5 seconds, what is the impulse?

A) 4 Ns B) 100 Ns C) 200 Ns D) 50 Ns

36. When you push a wall, the wall pushes back on you with an equal and opposite force. This is an example of:

A) Newton's First Law B) Newton's Second Law C) Newton's Third Law D) Friction

37. Which of the following is a contact force?

A) Gravitational force B) Magnetic force C) Frictional force D) Electric force

38. The SI unit of force, Newton, is defined as:

A) 1 kg m/s B) 1 kg m/s² C) 1 kg²/m D) 1 kg m²/s

39. An object is moving at a constant speed in a circular path. Is there a net force acting on it?

A) No, because the speed is constant B) Yes, a centripetal force is acting C) No, because there is no acceleration D) Yes, a centrifugal force is acting

40. If the mass of an object decreases, its inertia:

A) Increases B) Decreases C) Remains the same D) Becomes zero

41. Which law quantifies the relationship between force, mass, and acceleration?

A) First Law B) Second Law C) Third Law D) Law of Inertia

42. A force of 50 N is applied to a 25 kg object. What is the acceleration?

A) 0.5 m/s² B) 2 m/s² C) 1250 m/s² D) 50 m/s²

43. The product of mass and acceleration is equal to:

A) Momentum B) Velocity C) Force D) Impulse

44. What happens to the momentum of an object if its mass is doubled and its velocity is halved?

A) It doubles B) It halves C) It remains the same D) It becomes zero

45. A stationary object begins to move when a force is applied to it. This is an example of:

A) Newton's First Law B) Newton's Second Law C) Newton's Third Law D) Law of Conservation of Momentum

46. The tendency of an object to resist a change in its state of motion is called:

A) Momentum B) Inertia C) Force D) Acceleration

47. If a force F acts on a body of mass m, and produces an acceleration a, then F = ma. This is:

A) A definition B) Newton's First Law C) Newton's Second Law D) Newton's Third Law

48. A swimmer pushes water backward to move forward. This is an illustration of:

A) Newton's First Law B) Newton's Second Law C) Newton's Third Law D) Archimedes' Principle

49. The unit of mass in the CGS system is:

A) Kilogram B) Gram C) Pound D) Newton

50. Which law states that the total momentum of an isolated system remains constant?

A) First Law B) Second Law C) Third Law D) Law of Conservation of Momentum

Force and laws of motion - Online Test

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