question archive An electric motor rotating a grinding wheel at 100 rev/min is switched off

An electric motor rotating a grinding wheel at 100 rev/min is switched off

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An electric motor rotating a grinding wheel at 100 rev/min is switched off. The wheel then moves with a constant negative angular acceleration of magnitude 2.00 rad/s2. (a) During what time interval does the wheel come to rest? (b) Through how many radians does it turn while it is slowing down?

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