o o Where m1 , m2 are the masses of the two blocks
v1 is initial velocity of block 1 , v2 = 0 here vf is final velocity of the two block moving together
Example : The bob A of a pendulum is released to hit vertically another bob B of the same mass at rest on a table as shown in Figure . How high does the bob A rise after the elastic collision ?
Solution : Since this is a case of both objects with same mass , so the bob B will move with the velocity of bob A . Now with energy conservation it will rise to a height of h only .