College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 65

A stationary ice skater with a mass of 80.0 kg and a moment of inertia (about her central vertical axis) of 3.00 kg · m 2 catches a baseball with her outstretched arm. Tire catch is made at a distance of 1.00 m from the central axis. The ball has a mass of 145 g and is traveling at 20.0 m/s before the catch. (a) What linear speed does the system (skater + ball) have after the catch (b) What is the angular speed of tire system (skater + ball) after the catch (c) What percentage of the ball's initial kinetic energy is lost during the catch Neglect friction with the ice