Question 5: Work, Energy and Power & Circular Motion

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.

Accepted Answer

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 $$v=\sqrt{g r}$$

Answer

Both assertion and reason are true and reason is the correct explanation of assertion

Answer

Both assertion and reason are true but reason is not the correct explanation of assertion

Answer

Assertion is true but reason is false

Answer

Both assertion and reason are false.

Work, Energy and Power & Circular Motion

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.

Choose the correct answer: