13. Rotational Inertia & Energy
Torque with Kinematic Equations
9:26 minutes
Problem 10.11b
Textbook Question
Textbook QuestionA machine part has the shape of a solid uniform sphere of mass 225 g and diameter 3.00 cm. It is spinning about a frictionless axle through its center, but at one point on its equator it is scraping against metal, resulting in a friction force of 0.0200 N at that point. (b) How long will it take to decrease its rotational speed by 22.5 rad/s?
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