While considering collision of bodies, which of the following statements are true?

A. Energy and momentum are conserved during elastic collisions

B. Momentum is conserved during inelastic collisions

C. Energy is conserved during inelastic collisions

D. Energy and momentum are conserved during completely inelastic collisions

This question was previously asked in
ISRO VSSC Technical Assistant Mechanical 14 July 2021 Official Paper
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  1. B & C
  2. C & D
  3. A & B
  4. A & C

Answer (Detailed Solution Below)

Option 3 : A & B
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Detailed Solution

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CONCEPT:

  • Collision: A collision is said to occur between two objects, either if they physically collide against each other or if the path of one object is affected by the force exerted by the other objects.

Characteristic of elastic and inelastic collision:

Elastic collision

Inelastic collision

  • The kinetic energy is conserved.
  • The kinetic energy is not conserved.
  • The momentum is conserved.
  • The momentum is conserved.
  • Total energy is conserved.
  • The total energy is conserved.
  • Forces involved during collision are conservative.
  • Some or all of the forces involved during collision are non-conservative.

  • The coefficient of restitution is equal to 1 for elastic collision and less than 1 for the inelastic collision.

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