The instantaneous angular position of a point on a rotating wheel is given by the equation \( Q(....

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The instantaneous angular position of a point on a rotating wheel is given by the equation
\( \mathrm{P} \)
\( Q(t)=2 t^{3}-6 t^{2} \). The torque on the wheel becomes zero at
(1) \( t=0.5 \mathrm{~s} \)
(2) \( t=0.25 \mathrm{~s} \)
(3) \( t=2 \mathrm{~s} \)
(4) \( t=1 \mathrm{~s} \)


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