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Question

Two identical balls are approaching towards each other on a straight line with velocity 2m/s and 4m/s, respectively. Find the final velocities, after elastic collision between them.
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Solution

In elastic collision If mass of both bodies are same then velocity interchange.
Ist partical moves with 2 m/s in n direction
IInd partical moves with 4 m/s in n direction
After collision
Ist partical moves 4 m/s in (ve)
IInd partical moves 2 m/s in (+ve)

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