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

تمرين 79

An ice skater has a moment of inertia of 100 kg · m 2 when his arms are outstretched and a moment of inertia of 75 kg · m 2 when his arms are tucked in close to his chest. If he starts to spin at an angular speed of 2.0 rps (revolutions per second) with his arms outstretched, what will Ms angular speed be when they are tucked in