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A billiard ball moving with a speed of 5...

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

A

1.0 m/s

B

5 m/s

C

10 m/s

D

2.5m/s

Text Solution

Verified by Experts

The correct Answer is:
B
Total initial momentum = Total final momentum
`therefore m xx v =((m)/(4)xx0)+(3m)/(4) v'`
`therefore v'=(4v)/(3)`
`therefore ` The velocity of the other part will `(4v)/(3)` .
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