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The frequency of rotation of fan change from 2rev/s to 7rev/s in 10sec.find the angular acceleration.
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V = Vo + a*t = 7.
2 + a*10 = 7,
a = 0.5 rev/s^2.
or a = 0.5rev/s^2 * 6.28rad/rev = 3.14 rad/s^2.
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