Posted by **aok** on Thursday, November 4, 2010 at 8:28pm.

A pulley rotating in the counterclockwise direction is attached to a mass suspended from a string. The mass causes the pulley's angular velocity to decrease with a constant angular acceleration α = -2.2 rad/s2. If the pulley's initial angular velocity is ω = 5.37 rad/s, how long does it take before the angular velocity of the pulley is equal to -3.5 rad/s?

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