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A 1.29-kg grinding wheel 26.3 cm in diameter (you can model it as a uniform circular...

A 1.29-kg grinding wheel 26.3 cm in diameter (you can model it as a uniform circular thin disk) is spinning counterclockwise at a rate of 802.3 revolutions per second about its symmetry axis. When the power to the grinder is turned off, the grinding wheel slows with constant angular acceleration and takes 34.2 s to come to a rest. What was the absolute value of work (in unit of J) done by the net external torque on the grinding wheel as it came to rest?

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