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Two balls having masses m and 2m are fas...

Two balls having masses m and 2m are fasrtened to two light strings of same length (figure). The other ends of the strings are fixed at O. The strings are kept in the same horizontal line and the system is released from rest. The collision between the balls is elastic. Point A is the lowest point at which either ball can reach

The speed of ball of mass 2m just after collision (for the first time) is over

A

`(l)/(g)`

B

`(2l)/(g)`

C

`l`

D

`2l`

Text Solution

Verified by Experts

The correct Answer is:
A
The maximum height to which the wall of mass `2m` rises is
`h = (v_(2)^(2))/(2g) = (l)/(g)`
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