In a circus, a stuntman rides a motor bike in a vertical circular track of radius $r$. Find the minimum speed, he must maintain at highest point of track.

Question

In a circus, a stuntman rides a motor bike in a vertical circular track of radius $r$. Find the minimum speed, he must maintain at highest point of track., $\sqrt{2 g r}$, $2 \sqrt{g r}$, $\sqrt{g r}$, $\sqrt{5 g r}$

MARKS App · Accepted Answer

For motion in vertical circle, to complete the revolution of moving body, the minimum speed of body at lowest point and highest point should be $\sqrt{5 g r}$ and $\sqrt{g r}$ respectively, where $r$ is the radius of circular path. Hence, in circus, for completing vertical circular track, minimum speed of stuntman at highest point of track should be $\sqrt{g r}$.

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