Question: A yo-yo moves downward until it reaches the end of its string, where it sleeps. As it sleeps-that is, spins in place-its angular speed decreases

A yo-yo moves downward until it reaches the end of its string, where it "sleeps." As it sleeps-that is, spins in place-its angular speed decreases from 35 rad/s to 25 rad/s. During this time it completes 120 revolutions.

(a) How much time did it take for the yo-yo to slow from 35 rad/s to 25 rad/s?

(b) How much time does it take for the yo-yo to slow from 25 rad/s to 15 rad/s? Assume a constant angular acceleration as the yo-yo sleeps.

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