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A projectile is fired from the surface o...

A projectile is fired from the surface of earth of radius R with a velocity `etav_(e)` where `v_(e)` is the escape velocity and `eta lt 1`. Neglecting air resistance, the orbital velocity of projectile is -

A

`v_(e) sqrt(1-eta^(2))`

B

`v_(e)sqrt((eta^(2))/(5))`

C

`(2)/(5)v_(e)sqrteta`

D

`(2eta)/(5)v_(e)`

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The correct Answer is:
A
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