In 1993 a giant 400-kg yo-yo with a radius of 1.5 m was dropped from a crane at height of 57 m. One end of the string was tied to the top of the crane, so the yo-yo unwound as it descended. Assuming that the axle of the yo-yo had a radius of 0.10 m, estimate its linear speed at the end of the fall. (Assume the yo-yo has enough string to reach the ground.)