JEE Main - Newton’s laws of motion and impulse Online Test (MCQ Quiz)

1. Which of Newton's laws of motion describes inertia?

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

2. Newton's Second Law of Motion relates force, mass, and acceleration by the formula:

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

3. For every action, there is an equal and opposite reaction. This statement is a description of:

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

4. An object at rest will remain at rest, and an object in motion will remain in motion with a constant velocity, unless acted upon by a net external force. This is Newton's:

A) First Law B) Second Law C) Third Law D) Fourth Law

5. The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction of the force. This is Newton's:

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

6. What is the SI unit of force?

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

7. Impulse is defined as the change in:

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

8. The product of force and the time interval over which it acts is equal to:

A) Work done B) Change in kinetic energy C) Impulse D) Power

9. If a net force F acts on an object of mass m for a time interval Δt, the impulse delivered to the object is:

A) F / Δt B) F * Δt C) F + Δt D) F - Δt

10. A body of mass 'm' moving with velocity 'v' has momentum 'p'. If the velocity changes to 'v'', the change in momentum is:

A) mv B) mv' C) m(v' - v) D) m(v + v')

11. The impulse-momentum theorem states that:

A) Impulse is equal to work done B) Impulse is equal to the change in momentum C) Impulse is equal to change in kinetic energy D) Impulse is equal to the product of mass and velocity

12. A large force acting for a short time produces the same effect as:

A) A small force acting for a long time B) A small force acting for a short time C) A large force acting for a long time D) No force acting

13. When a cricket player catches a fast-moving ball, they often move their hands backward. This action:

A) Increases the time of impact, decreasing the force B) Decreases the time of impact, increasing the force C) Increases the momentum of the ball D) Decreases the impulse

14. A cannon fires a projectile. According to Newton's Third Law, the cannon will experience:

A) An equal and opposite recoil momentum B) An equal and opposite recoil force C) A greater forward force D) No reaction force

15. If the net external force on a system is zero, then:

A) The momentum of the system changes B) The velocity of the system changes C) The momentum of the system remains constant D) The acceleration of the system is non-zero

16. A body is pushed with a constant force. Which of the following quantities is constant if the mass is also constant?

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

17. The impulse is a vector quantity. Its direction is the same as the direction of:

A) The initial momentum B) The final momentum C) The net force D) The change in velocity

18. In which scenario is the impulse experienced by an object the greatest?

A) A small force applied for a long time B) A large force applied for a short time C) A small force applied for a short time D) A large force applied for a long time

19. Consider a system of two particles colliding. If there are no external forces, the total momentum of the system:

A) Increases B) Decreases C) Remains conserved D) May increase or decrease depending on the collision type

20. A car of mass 1000 kg is traveling at 20 m/s. If it stops in 10 seconds, what is the impulse experienced by the car?

A) 20000 Ns B) -20000 Ns C) 10000 Ns D) -10000 Ns

21. If the velocity of an object doubles, its momentum:

A) Remains the same B) Doubles C) Quadruples D) Is halved

22. Inertia is a measure of:

A) The force required to change motion B) The resistance of an object to changes in its state of motion C) The total energy of an object D) The speed of an object

23. Which of the following is an example of Newton's Third Law in action?

A) A book resting on a table B) A car accelerating on a road C) A rocket expelling gas downwards to move upwards D) A ball rolling down an inclined plane

24. The unit of impulse can also be expressed as:

A) kg m/s² B) kg m/s C) kg m²/s D) N/m

25. If a force F is applied to an object of mass m, the acceleration produced is a. If the same force is applied to an object of mass 2m, the acceleration will be:

A) a B) 2a C) a/2 D) 4a

26. The momentum of a body is the product of its mass and:

A) Acceleration B) Force C) Velocity D) Displacement

27. A bullet is fired from a gun. The gun recoils backward because of:

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

28. If a force of 10 N acts on a mass of 5 kg for 2 seconds, the impulse delivered is:

A) 10 Ns B) 20 Ns C) 50 Ns D) 100 Ns

29. Which law states that the inertia of an object depends on its mass?

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

30. A quantity that measures the 'quantity of motion' in a body is:

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

31. If a force causes an object to change its velocity, then the object must have experienced:

A) Zero net force B) A net impulse C) Zero momentum D) Constant velocity

32. What is the impulse if a force of 50 N acts on an object for 0.5 seconds?

A) 25 Ns B) 100 Ns C) 50 Ns D) 0.5 Ns

33. According to Newton's Second Law, if mass is kept constant, force is directly proportional to:

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

34. A tug-of-war contest where both teams pull with equal force but one team moves the other is an illustration of:

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

35. The impulse-momentum theorem is essentially a restatement of:

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

36. A hammer strikes a nail. The force exerted by the hammer on the nail is equal and opposite to:

A) The force exerted by the nail on the hammer B) The initial momentum of the hammer C) The final momentum of the nail D) The friction between the hammer and the nail

37. If a force of 20 N acts on a mass of 4 kg for 3 seconds, what is the change in momentum?

A) 12 kg m/s B) 60 kg m/s C) 80 kg m/s D) 240 kg m/s

38. What is the unit of momentum?

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

39. An object's resistance to a change in its state of motion is called:

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

40. If the net force on an object is zero, its acceleration is:

A) Maximum B) Minimum but non-zero C) Zero D) Dependent on velocity

41. Which principle states that in the absence of an external force, the total momentum of a system remains constant?

A) Principle of Superposition B) Principle of Inertia C) Principle of Conservation of Momentum D) Principle of Action-Reaction

42. A particle of mass m is acted upon by a force F. Its momentum changes from p1 to p2. The impulse is:

A) F B) m(p2-p1) C) p2 - p1 D) F/(p2-p1)

43. If the mass of an object is halved and its velocity is doubled, its momentum will be:

A) The same B) Doubled C) Quadrupled D) Halved

44. Newton's Second Law can be expressed as the relationship between force and the rate of change of:

A) Velocity B) Kinetic Energy C) Momentum D) Angular Momentum

45. A rocket works on the principle of:

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

46. The impulse experienced by a body is equal to the change in its:

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

47. If a constant force F acts on a body of mass m for time Δt, the change in momentum is given by:

A) m * F * Δt B) F / (m * Δt) C) F * Δt / m D) F * Δt

48. Which law states that an object will continue in its state of rest or uniform motion unless acted upon by an external force?

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

49. A body of mass 2 kg is moving with a velocity of 10 m/s. If a force of 5 N is applied opposite to the direction of motion for 2 seconds, the final velocity will be:

A) 5 m/s B) 15 m/s C) 20 m/s D) 2.5 m/s

50. Impulse is the effect of a force acting over a period of:

A) Distance B) Time C) Area D) Volume

Newton’s laws of motion and impulse - Online Test

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