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Free Collisions MCQs with Answers

22 Collisions MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Collisions involve the conservation of linear momentum when bodies interact for a short time. The topic covers impulse, elastic and inelastic collisions, kinetic energy changes, and the coefficient of restitution, with calculations usually based on one dimensional motion. Momentum remains conserved in isolated collisions, but kinetic energy is conserved only in elastic collisions.

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22 questions · page 2 of 2

21. A bullets of mass m moving with a velocity v is fired into a large wooden block of mass M. If the bullet remains embedded in the wooden block, the velocity of the system will be:

  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Explanation: Since there is no extra force other than the action and reaction force so the linear momentum should be conserved.Suppose the system moves…

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Correct answer: Option B

22. A body of mass 2kg collides with a wall with speed 100 m s-1 and rebounds with the same speed the force exerted on the wall is 2 x 10^4 N. The time of contactis:

  • A. 1/50 Sec
  • B. 1/25 Sec
  • C. 1/60 Sec
  • D. 1 Sec

Explanation: F=mv/t2 x 104 N =2*(100-(-100))/tt=1/50 s

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Correct answer: 1/50 Sec
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