Jessica stretches her arms out 0. 8 m from the center of her body while holding a 2. 0 kg mass in each hand. She then spins around on an ice rink at 1. 2 m/s.

A. What is the combined angular momentum of the masses?

B. If she pulls her arms in to 0. 12 m, what is her new linear speed?


Can someone explain what equations are used to solve part b?