A billiard ball moving with a speed of 5 m/s collides with an identical ball originally at rest. If the first ball stops after collision, then the second ball will move forward with a speed of

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10 ms−1

5 ms−1

2.5 ms−1

1.0 ms−1

answer is B.

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Detailed Solution

In elastic head on collision velocities gets interchanged.

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