1. A spring with spring constant28N/m is compressed a distance of9.0cm by a ball with a mass of201.5g (see figure below). The ball is then released and rolls without slipping along a horizontal surface, leaving the spring atpointA.The process is repeated, using a block instead, with a mass identical to that of the ball. The block compresses the spring by9.0cmand is also released, leaving the spring atpointA.Assume the ball rolls, but ignore other effects of friction. (Assume that the ball is a solid ball.)

(a) What is the speed of the ball at pointB? m/s (b) What is the speed of the block at pointB?

2. A spring with spring constant22N/m is compressed a distance of6.0cm by a ball with a mass of210.5g (see figure below). The ball is then released and rolls without slipping along a horizontal surface, leaving the spring atpointA.The process is repeated, using a block instead, with a mass identical to that of the ball. The block compresses the spring by6.0cmand is also released, leaving the spring atpointA.Each object travels up the incline shown in the figure before coming to rest momentarily. Assume the ball rolls, but ignore other effects of friction. (Assume the ball rolls without slipping up the incline until it comes to rest.)

(a) How high above the starting position is the ball when it comes to rest momentarily? m (b) How high above the starting position is the block when it comes to rest momentarily?