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.

Explanation

(a) As the collision is elastic and two balls have same mass, therefore, ball `A` transfers its entire linear momentum to `B` and does not rise at all.