Question

A diver with a mass of 62.0 kg is rotating head-over-heels in mid-air, at an angular speed of 3.00 revolutions per second, in a tucked position (that is, with arms, legs, and head pulled into a tight ball). In this position, the diver can be modeled as a solid sphere with a radius of 0.600 m, rotating about its center. Just before landing, while still in the air, the diver fully extends her arms and legs. In this position, she can be modeled as a long, thin rod, with a length of 1.90 m, the distance from her feet to her fingertips. The rod rotates about the center, with the axis of rotation perpendicular to the length of the rod. What is her angular speed (in revolutions per second) with her arms and legs fully extended?

Answer 1