A compact disc rotates about its center at constant angular speed. Which one of the following quantities is constant and non-zero for a dust particle near the edge of the disc?

Name: A compact disc rotates about its center at constant angular speed. Which one of the following quantities is constant and non-zero for a dust particle near the edge of the disc?
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Question

Quizplus · Accepted Answer

Angular momentum is conserved for a dust particle near the edge of the disc because there is no external torque acting on the particle.

A Compact Disc Rotates About Its Center at Constant Angular