A solid sphere of radius .10 m and mass 2.5 kg rolls down a ramp that is 3 m high. What is its velocity at the bottom of the ramp? (should look like '5.87 m/s]
An ice skater has, by herself, a moment of inertia of 5.5 kg m^2 with her arms out. With her arms in, it is 5.0 kg m^2. She is also holding two 10 kg masses with her arms out 0.8 m. If initially she has an angular velocity of 2.50 rad/s, how fast will she be spinning if she brings her arms in a distance of .7 m? (looks like '5.75 rad/s')