A mass = [m1] kg is connected by a light cord to a mass =…

A mass = kg is connected by a light cord to a mass = kg which slides on a smooth surface, as shown in the figure. The pulley of radius = .0 cm rotates about a frictionless axle. The acceleration of is m/s2. What is the moment of inertia of the pulley? Please give your answer in units of kg·m2.

A figure skater stands on one spot on the ice (assumed frict…

A figure skater stands on one spot on the ice (assumed frictionless) and spins around with her arms extended. When she pulls in her arms, she reduces her rotational inertia and her angular speed increases. Compared to her initial angular momentum, her final angular momentum after she has pulled in her arms must be