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In a loop ,a body starts at a height h ...

In a loop ,a body starts at a height h =2R. The minimum speed with which the body must be pushed down initially in order that it may be able to complete the vertical circle is

A

`sqrt(2gR`

B

`sqrt(gR`

C

`sqrt(3gR`

D

`sqrt(5gR`

Text Solution

Verified by Experts

The correct Answer is:
D
For looping the loop, minimum velocity required is `sqrt(5gR)`. This must be the velocity of push down initially
`because T_2=6mgand T_H=0` for just completing vertical circle.
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