# How to find time taken for a spinning top to stop? [closed]

The angular position of a spinning top is given by $\theta = t^3 - 72t$, where $t$ is in seconds and $\theta$ in "radian".

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## closed as too localized by Waffle's Crazy Peanut, Qmechanic♦May 13 '13 at 11:42

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We want the condition angular speed to be zero .So use:$$\omega=d\theta/dt=0$$