When the power is turned off on a turntable spinning at 670, Ask an Expert

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When the power is turned off on a turntable spinning at 67.0 rpm, you find that it takes 13.0 revolutions for it to stop while slowing down at a uniform rate.

A) What is the angular acceleration (in rad/s^2), of this turntable?

B) How long does it take to stop after the power is turned off? (in s)

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