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A 755 gram grinding wheel 25.5 cmin diameter is in the shape of a uniform solid disk. (We can ignore the small hole at the center.) When it is in use, it turns at a constant 230 rpmabout an axle perpendicular to its face through its center. When the power switch is turned off, you observe that the wheel stops in 45.5 swith constant angular acceleration due to friction at the axle.

A) What torque does friction exert while this wheel is slowing down?

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