Repeat Problem 43, but now assume the person is holding a 5.0-kg mass in each hand. (re...

Repeat Problem 43, but now assume the person is holding a 5.0-kg mass in each hand.

(reference problem 43)

Consider a person who is sitting on a frictionless rotating stool as in Figure P9.43. The person initially has his arms outstretched and is rotating with an angular speed of 5.0 rad/s. He then pulls his arms close to his body. (a) Estimate his final angular speed. (b) Estimate the kinetic energy before and after the person pulls his arms into his body.

(reference figure P9.43)