Question

Assertion For looping a vertical loop of radius, $r$ the minimum velocity at lowest point should be $\sqrt{5 g r}$.
Reason In this event the velocity at the highest point will be zero.

• A. Both assertion and reason are true and reason is the correct explanation of assertion
• B. Both assertion and reason are true but reason is not the correct explanation of assertion
• C. Assertion is true but reason is false.
• D. Both assertion and reason are false.

Answer 1

Answer: (C)

At the lowest point of a vertical circle, the minimum velocity at the bottom
$u_{\min }=\sqrt{5 g r}$
At $u=\sqrt{5 g r}$
Velocity at highest point $v=\sqrt{g r}$