The bob A of pendulum of length 1 m released from 30^(@) to the vertical hits another bob B of same mass at rest on the table. How high does the bob A rise after the collision and find the velocity of B.

The bob A of pendulum of length 1 m released from 30^(@) to the vertic

1.	The bob A of pendulum of length 1 m released from 30^(@) to the vertical hits another bob B of same mass at rest on the table. How high does the bob A rise after the collision and find the velocity of B.
Answer» Solution :The bob of pendulum acquires a VELOCITY `V=SQRT(2gl(1-cos theta))`, on reaching the LOWER most position and makes elastic collision with the bob B of same mass. Hence the bodies simply EXCHANGE their velocities after collision. The bob of pendulum does not rise at all and velocity of B is `V = sqrt(2gl(1-cos theta))=1.62 ms^(-1)`