The angular speed of a motor wheel is increased from $1200 \mathrm{~rpm}$ to $3120 \mathrm{~rpm}$ in $16 \mathrm{~s}$. The angular acceleration of the motor wheel is

Question

$4 \pi \mathrm{~rad} / \mathrm{s}^2$

$6 \pi \mathrm{~rad} / \mathrm{s}^2$

$8 \pi \mathrm{~rad} / \mathrm{s}^2$

$2 \pi \mathrm{~rad} / \mathrm{s}^2$

Solution

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