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Rotation: Angular Velocity Dynamics

Problem #: 2 | Variant #: 2

A 7.987 kg, 0.98 m wide rectangular piece of plywood is horizontally mounted in such a way that it can be spun about its center. There is a 0.4864 N-m torque while it is rotating due to friction in the bearings. If it is set spinning at a rate of 30.1 rpm and takes 15.6 s to come to a stop, what is the length of the board?

m

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