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The angular speed of a fly wheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The angular acceleration in rad/ $s^{2}$ is

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$4 π$

$104 π$

$2 π$

$12 π$

answer is B.

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Detailed Solution

$α = \frac{ω - ω_{0}}{t}$

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