pivot without friction about the point O. This pendulum is released from rest in a horizontal position and when the ball is at its lowest point it strikes a 3.6 kg block at rest on a shelf. Assume that the collision is perfectly elastic and take the coe?cient of friction between the block and shelf to be 0.76.
How far does the block move before coming to rest? The acceleration due to gravity is 9.81 m/s^2.