When the power is turned off on a turntable spinning at 78, Ask an Expert

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When the power is turned off on a turntable spinning at 78 rpm, you find that it takes 10.5 revolutions for it to stop while slowing at a constant rate.

a) What is the angular acceleration of the turntable?

b) How much time passes until it stops? Please show all of the steps. Thank you.

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