The disk has a mass of 15 kg. If it is released from rest when θ = 30°, determine the ma...

The disk has a mass of 15 kg. If it is released from rest when θ = 30°, determine the maximum angle θ of rebound after it collides with the wall. The coefficient of restitution between the disk and the wall is e = 0.6. When θ = 0°, the disk hangs such that it just touches the wall. Neglect friction at the pin C.