A ball is released from rest on a no-slip surface, as shown. After reaching its lowest point, the ball begins to rise again, this time on a frictionless surface. Assume the ball is a solid sphere of radius 2.6 cm and mass 0.11 kg. The ball is released from rest at a height of 0.72 m above the bottom of the track on the no-slip side.
(a) What is its angular speed when it is on the frictionless side of the track?
(b) How high does the ball rise on the frictionless side?