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In a system of particles, if the total momentum before a collision is equal to t

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Question: In a system of particles, if the total momentum before a collision is equal to the total momentum after the collision, what type of collision is this?

Options:

  1. Elastic collision
  2. Inelastic collision
  3. Perfectly inelastic collision
  4. Explosive collision

Correct Answer: Elastic collision

Solution: 

This describes an elastic collision, where both momentum and kinetic energy are conserved.

In a system of particles, if the total momentum before a collision is equal to t

Practice Questions

Q1
In a system of particles, if the total momentum before a collision is equal to the total momentum after the collision, what type of collision is this?
  1. Elastic collision
  2. Inelastic collision
  3. Perfectly inelastic collision
  4. Explosive collision

Questions & Step-by-Step Solutions

In a system of particles, if the total momentum before a collision is equal to the total momentum after the collision, what type of collision is this?
  • Step 1: Understand what momentum is. Momentum is the product of an object's mass and its velocity.
  • Step 2: Know that in a collision, we can look at the total momentum before and after the event.
  • Step 3: If the total momentum before the collision is the same as the total momentum after the collision, it means momentum is conserved.
  • Step 4: In an elastic collision, not only is momentum conserved, but kinetic energy is also conserved.
  • Step 5: Therefore, if both momentum and kinetic energy are conserved, the collision is classified as an elastic collision.
  • Conservation of Momentum – In a closed system, the total momentum before and after a collision remains constant.
  • Types of Collisions – Collisions can be elastic (both momentum and kinetic energy conserved) or inelastic (momentum conserved, kinetic energy not conserved).
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