1. A young girl spins a basketball with a radius of 0.140m on her finger. The ball makes 20.0 complete revolutions every 25.0 seconds.

A. What is the angular displacement of the ball?

B. What is the angular velocity of the ball?

C. She then places a finger from the other hand on the side of the ball, bringing it to a stop in 40.0 rad. Calculate the angular accelertion of the ball.

D. What would be the tangential acceleration of the ball during this time period?

2. A hollow ball (I=²/₃MR²) is pushed from rest so that it rolls without slipping across a level surface. A force of 10.0N is applied over a distance of 5.00m.

A. the ball has a mass of 2.50kg and a radius of 0.750m. Using the Work-Kinetic Energy Theorem determine the final kinetic energy of the disk.

B. What is the final angular velocity of the disk?

C. Would the hollow ball be going slower or faster if it had been a solid sphere (I=²/₅MR²)? Justify your answer