NEET UG - Momentum, Newtons second law of motion, impulse One Line Questions & Answers

1. A constant force F acts on a body of mass m for time Δt. If the initial momentum is p_i and final momentum is p_f, then F is equal to: — (p_f - p_i) / Δt

2. If a force of 50 N acts on a body for 0.05 s, the impulse is: — 2.5 Ns

3. If the momentum of a particle is increased by 50%, its kinetic energy increases by a factor of: — 2.25

4. A car of mass 1000 kg is moving with a velocity of 20 m/s. What is its momentum? — 20000 kg m/s

5. A body of mass 2 kg has momentum 6 kg m/s. Its kinetic energy is: — 9 J

6. A force of 10 N acts on a body of mass 5 kg for 2 seconds. The change in momentum of the body is: — 20 kg m/s

7. What is the magnitude of the momentum of a 2 kg object moving at 10 m/s? — 20 kg m/s

8. A body of mass 10 kg is moving with a velocity of 5 m/s. If a force of 20 N is applied in the direction of motion for 2 seconds, the new momentum will be: — 90 kg m/s

9. If a force F = 5t + 2 acts on a body of mass 1 kg from t=0 to t=2s, the impulse is: — 14 Ns

10. A large force acts for a short duration. This is best described as: — An impulse

11. In which of the following scenarios is the impulse maximum? — A force of 5 N acting for 0.5 s

12. Consider a situation where a bat hits a ball. The impulse experienced by the ball is equal to the: — Change in momentum of the ball

13. Which of the following is equivalent to impulse? — Change in momentum

14. The area under the force-time graph represents: — Impulse

15. When a bullet is fired from a gun, the gun recoils. This is an example of: — Conservation of linear momentum

16. If the time of impact is reduced, while the change in momentum remains the same, the average force will: — Increase

17. If a net force F acts on a body of mass m, and its momentum changes from p1 to p2 in time Δt, which equation represents Newton's second law? — F = (p2 - p1) / Δt

18. Impulse is defined as the product of: — Force and time interval

19. Which statement best describes the relationship between force and momentum according to Newton's second law? — Force is equal to the rate of change of momentum.

20. If the mass of a body is kept constant, and its momentum is increased by 100%, its velocity will: — Double

21. If the velocity of a body is doubled, its momentum is: — Doubled

22. A large force acting for a very short time is called: — Impulse

23. The product of mass and velocity of a body is called: — Momentum

24. Which of the following statements is INCORRECT regarding impulse? — Impulse is a scalar quantity.

25. A cricket player catches a fast-moving ball by moving his hands backward. This is done to: — Increase the time of impact, thus decreasing the force

26. According to Newton's second law, if the net force acting on an object is zero, then the object's momentum: — Remains constant

27. Which of the following is a direct consequence of Newton's second law? — Impulse-momentum theorem

28. Consider a system of two particles A and B. If no external force acts on the system, the total momentum of the system: — Remains constant

29. A body is moving with a constant velocity. What can be said about the net force acting on it? — It is zero

30. A body is acted upon by a net force. What happens to its momentum? — It changes.

31. Which quantity is conserved in an isolated system according to Newton's laws? — Momentum

32. If two objects of masses m1 and m2 have the same momentum, what is the ratio of their kinetic energies? — m2/m1

33. Newton's second law provides a quantitative definition of: — Force

34. Newton's second law of motion can be used to define: — Force

35. The change in momentum of a body is equal to the: — Impulse applied to it

36. The impulse-momentum theorem states that the impulse applied to an object is equal to the: — Change in the object's momentum

37. The SI unit of impulse is: — Newton-second

38. What is the SI unit of momentum? — Kilogram-meter per second

39. The principle of conservation of linear momentum is a consequence of which law of motion? — Newton's Third Law

40. A rocket expels gases downwards at a high velocity. The upward thrust experienced by the rocket is due to: — Conservation of momentum

41. A body of mass m has momentum p. If its kinetic energy is doubled, what will be its new momentum? — p * sqrt(2)

42. If the momentum of an object of mass m is p, its kinetic energy is given by: — p^2 / (2m)

43. Momentum is a vector quantity. Which of the following correctly represents its direction? — In the same direction as the velocity

44. A body is at rest. Its momentum is: — Zero

45. If the mass of a body is doubled and its velocity is halved, its momentum will: — Remain the same

46. If the net force acting on a system is zero, then: — The momentum of the system remains constant

47. A force F acts on a body of mass m. If the force is doubled and the mass is halved, the acceleration will be: — Quadrupled

48. Newton's second law of motion states that the rate of change of momentum of a body is directly proportional to: — The net external force acting on the body

49. Which of the following is NOT conserved in a collision if external forces are present? — Total momentum

50. A ball of mass 0.2 kg collides with a wall and bounces back with the same speed of 10 m/s. The impulse experienced by the ball is: — 4 kg m/s

Momentum, Newtons second law of motion, impulse - One Line Questions