The uniform bar AB of a mass of 4.5 kg connects the small sliding collar
The uniform bar AB of a mass of 4.5 kg connects the small sliding collar A to the homogeneous disk of a mass of 6.8 kg. When the system is released from rest in the position shown, the collar slides down the vertical rod and the disk rolls without slipping on the horizontal surface. Determine (a) the velocity of the collar when it is about collide with the spring; and (b) the maximum deflection of the spring after the collision.