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Question

At low speed, a fan blade is turning at 80 rad/s clockwise. The fan is turned up a notch to rotate at 125 rad/s clockwise. If the time to change speeds is 0.5 s, find the angular acceleration of the fan blades

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Solution

Initial angular velocity is ω1=80rad/s and final angular velocity is ω2=125rad/s
Angular acceleration α=ω2ω1t=125(80)0.5=450.5=90rads/sec2

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