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Question

Two perfectly elastic particles P and Q of equal mass travelling along the line joining them with velocities 15 m/sec and 10 m/sec. After collision, their velocities respectively (in m/sec) will be


A

0, 25

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B

5, 20

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C

10, 15

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D

20, 5

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Solution

The correct option is C

10, 15


For a collision between two identical perfectly elastic particles of equal mass, velocities after collision get interchanged.


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