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A fighter plane is moving in a vertical ...

A fighter plane is moving in a vertical circle of radius 'r'. Its minimum velocity at the highest point of the circle will be

A

`sqrt((1)/(2)gr)`

B

`sqrt(2gr)`

C

`sqrt(gr)`

D

`sqrt(3gr)`

Text Solution

Verified by Experts

The correct Answer is:
C
`H_("max")=R`
or `(u^(2) sin^(2) theta)/(2g)=(2u^(2) sin theta cos theta)/(g)`
`or tan theta=4 or theta =tan^(-1)(4)`
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