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The bob A of a pendulum released from ho...

The bob A of a pendulum released from horizontal to the vertical hits another bob B of the same mass at rest on a table as shown in figure.
If the length of the pendulum is 1m, calculate
(a) the height to which bob `A` will rise after collision.
(b) the speed with which bob `B` starts moving.
Neglect the size of the bobs and assume the collision to be elastic.

Text Solution

Verified by Experts

(a) For elastic collision of same masses , they interchange their velocities , so bob A will come to rest after collision and does not rise at all .
(b) Speed with which bob B starts moving
= speed with which bob A hits bob B
` = sqrt(2gh) = sqrt(2 xx 9.8 xx1 ) = 4.42 " m "s^(-1)`
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