7. a machine part has the shape of a solid uniform sphere of mass 225 g and diameter 3 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 0.02 n at that point. a. find its angular acceleration. b. how long will it take to decrease its rotational speed by 22.5 rad/s?

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18-11-2022
Physics

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7. a machine part has the shape of a solid uniform sphere of mass 225 g and diameter 3 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 0.02 n at that point. a. find its angular acceleration. b. how long will it take to decrease its rotational speed by 22.5 rad/s?

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Riya99 Riya99 · Answer 1 · 2022-11-22T05:08:59+01:00

Torque, rotational motion, and indeed the moment of inertia are all relevant ideas in this puzzle. The time it will require to slow down by 22.5 rad/s is "1.52 s".

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An object rotating experiences a change is angular velocity per unit of time, which is quantified as angular acceleration (also known as rotational acceleration). It is a vector quantity that has two clearly defined directions and senses and a magnitude component.

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