A cylindrical pulley with a uniform solid disk shape has a radius of 10.0cm and a mass of 0.80kg. A 1.0kg weight is attached with a light wire wrapped around the rim of the pulley.
a. If the weight is dropped and the pulley unwinds, how far does the weight fall when the pulley has 5.0J of Kinetic Energy?
b. At this point, what total percentage of the kinetic energy does the pulley have?