In perfectly inelastic collision, the relative velocity of the bodies?

In perfectly inelastic collision, the relative velocity of the bodies?

1. Before impact is 0

2. After impact is 0

3. Before impact is equal to that after impact

4. None of these

Solution

According to question,

In perfectly inelastic collisions,

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Therefore, as we know that,

In a perfectly inelastic collision, two bodies stick together after the collision and move with same velocity,

So, their relative velocity after the impact is ZERO (v3- v3=0).

Hence, option (2) After impact is 0 is correct answer.

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