Physics Practice Problems Intro to Angular Collisions Practice Problems Solution: A disc with moment of inertia I1 = 40 kg • m2 and ...

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Solution: A disc with moment of inertia I1 = 40 kg • m2 and angular velocity ω1 = 20 rad/s is dropped on to a stationary second disc along the axis of rotation. The second disc has moment of inertia I2 = 60 kg • m2. How much rotational kinetic energy is lost? A. 3200 J B. 11300 J C. 8000 J D. 15000 J E. 4800 J

Problem

A disc with moment of inertia I1 = 40 kg • m2 and angular velocity ω1 = 20 rad/s is dropped on to a stationary second disc along the axis of rotation. The second disc has moment of inertia I2 = 60 kg • m2. How much rotational kinetic energy is lost?

A. 3200 J

B. 11300 J

C. 8000 J

D. 15000 J

E. 4800 J