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A turntable rotating at 60 rev/min is brought to rest in 15.7 s. a) What is...

A turntable rotating at 60 rev/min is brought to rest in 15.7 s.
a) What is the average angular acceleration of the turntable as it comes to rest?
b) Assuming that the angular acceleration is constant, find the number of turns revolutions the turntable makes during this time.
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