1. Momentum is defined as:
(A) Mass × acceleration
(B) Mass × velocity
(C) Force × distance
(D) Mass ÷ time
2. The SI unit of momentum is:
(A) Joule
(B) Newton
(C) Newton-second (Ns)
(D) Watt
3. Which quantity determines the inertia of motion of a body?
(A) Energy
(B) Force
(C) Momentum
(D) Power
4. The law of conservation of momentum states that momentum:
(A) Can be created
(B) Can be destroyed
(C) Remains constant in an isolated system
(D) Decreases with time
5. A collision in which kinetic energy is conserved is called:
(A) Elastic collision
(B) Inelastic collision
(C) Perfectly inelastic collision
(D) Plastic collision
6. A collision in which bodies stick together is called:
(A) Elastic collision
(B) Inelastic collision
(C) Perfectly inelastic collision
(D) Explosion
7. Momentum is a:
(A) Scalar quantity
(B) Vector quantity
(C) Dimensionless quantity
(D) Constant always
8. When two equal and opposite momenta act, the net momentum is:
(A) Zero
(B) Maximum
(C) Infinite
(D) Constant
9. The impulse-momentum theorem states:
(A) Impulse = Change in velocity
(B) Impulse = Change in momentum
(C) Impulse = Force × distance
(D) Impulse = Work done
10. The momentum of a body at rest is:
(A) Zero
(B) Infinite
(C) Equal to its mass
(D) Constant
11. In a collision, the total momentum before impact equals:
(A) Momentum after impact
(B) Twice the momentum
(C) Half the momentum
(D) Zero always
12. Which type of collision conserves both momentum and kinetic energy?
(A) Elastic
(B) Inelastic
(C) Explosive
(D) Plastic
13. Momentum is directly proportional to:
(A) Mass only
(B) Velocity only
(C) Mass and velocity
(D) Acceleration
14. Car airbags protect passengers by:
(A) Increasing velocity
(B) Reducing momentum
(C) Increasing collision time
(D) Eliminating inertia
15. In sports, momentum transfer occurs in:
(A) Bat hitting a ball
(B) Kicking a football
(C) Tennis racquet striking a ball
(D) All of the above
16. The product of force and time is called:
(A) Work
(B) Impulse
(C) Energy
(D) Momentum
17. Which factor increases the momentum of a body?
(A) Increasing its velocity
(B) Increasing its mass
(C) Increasing both mass and velocity
(D) Reducing acceleration
18. Momentum is conserved in collisions provided:
(A) No external force acts
(B) Gravity acts
(C) Friction acts
(D) Only internal forces act
19. In a head-on elastic collision of two equal masses, one at rest:
(A) Both stop
(B) The moving one stops, the other moves
(C) Both move together
(D) Both move in opposite directions
20. The unit of impulse is same as:
(A) Work
(B) Force
(C) Momentum
(D) Energy
21. In biomechanics, momentum is important in:
(A) Running
(B) Throwing
(C) Jumping
(D) All of the above
22. Which quantity is conserved in both elastic and inelastic collisions?
(A) Kinetic energy
(B) Momentum
(C) Work
(D) Potential energy
23. The change in momentum per unit time is equal to:
(A) Acceleration
(B) Velocity
(C) Force
(D) Displacement
24. A body moving with uniform velocity has:
(A) Zero momentum
(B) Constant momentum
(C) Increasing momentum
(D) Decreasing momentum
25. In a perfectly inelastic collision, maximum loss occurs in:
(A) Kinetic energy
(B) Momentum
(C) Mass
(D) Force
26. The momentum of a moving ball can be increased by:
(A) Reducing force
(B) Increasing mass or speed
(C) Reducing mass
(D) Reducing speed
27. Which sports technique uses momentum conservation?
(A) Billiards
(B) Bowling
(C) Javelin throw
(D) All of the above
28. The momentum of Earth revolving around the sun is maintained by:
(A) Internal energy
(B) Gravity and inertia
(C) Elastic force
(D) Friction
29. Elastic collision between gas molecules explains:
(A) Kinetic theory of gases
(B) Thermodynamics
(C) Frictionless motion
(D) Nuclear energy
30. In a recoil of a gun, momentum of bullet and gun are:
(A) Equal and opposite
(B) Unequal but opposite
(C) Equal and same direction
(D) Zero always
31. A goalkeeper stopping a football reduces injury by:
(A) Stopping the ball suddenly
(B) Moving hands backward with the ball
(C) Increasing velocity of ball
(D) Decreasing collision time
32. The conservation of momentum is based on:
(A) Newton’s First Law
(B) Newton’s Second Law
(C) Newton’s Third Law
(D) Newton’s Law of Gravitation
33. Impulse is equal to the area under:
(A) Force-time graph
(B) Velocity-time graph
(C) Distance-time graph
(D) Acceleration-time graph
34. The momentum of an athlete increases if:
(A) He reduces his mass
(B) He increases his speed
(C) He reduces friction
(D) He stands still
35. Which type of collision occurs in car accidents usually?
(A) Perfectly elastic
(B) Perfectly inelastic
(C) Elastic
(D) Frictionless
36. In biomechanics, momentum is essential for:
(A) Throwing events
(B) Tackling in rugby
(C) Martial arts strikes
(D) All of the above
37. Impulse can be reduced by:
(A) Increasing time of impact
(B) Reducing velocity
(C) Reducing force
(D) Increasing distance
38. A collision where bodies separate after contact is:
(A) Elastic
(B) Inelastic
(C) Plastic
(D) Explosion
39. A moving bus colliding with a stationary bus is an example of:
(A) Explosion
(B) Collision
(C) Frictional force
(D) Buoyancy
40. In boxing, gloves reduce injury by:
(A) Decreasing force
(B) Increasing impact time
(C) Reducing momentum
(D) Reducing velocity
41. The momentum of a system can only change when:
(A) Internal force acts
(B) External force acts
(C) Mass changes
(D) Time changes
42. Two skaters push off each other; their momentum after push is:
(A) Zero
(B) Equal and opposite
(C) Maximum
(D) Constant
43. In human movement, momentum helps in:
(A) Energy transfer
(B) Movement continuation
(C) Stability
(D) All of the above
44. An explosion demonstrates conservation of:
(A) Kinetic energy
(B) Momentum
(C) Both momentum and energy
(D) Mass only
45. Which quantity is not conserved in inelastic collisions?
(A) Momentum
(B) Mass
(C) Kinetic energy
(D) Linear motion
46. The force applied during a collision is greater if:
(A) Collision time is less
(B) Collision time is more
(C) Mass is less
(D) Speed is less
47. A moving truck has more momentum than a car at same speed because:
(A) Truck has more mass
(B) Truck has less friction
(C) Truck has more energy loss
(D) Car has more acceleration
48. Which of the following is an elastic collision?
(A) Billiard balls hitting
(B) Car crash
(C) Clay balls sticking together
(D) Ball of dough thrown on wall
49. In biomechanics, conservation of momentum is applied in:
(A) Pole vault
(B) High jump
(C) Gymnastics landing
(D) All of the above
50. The momentum of a bullet is high due to:
(A) Large mass
(B) High velocity
(C) Low acceleration
(D) Low weight