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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

`vesqrt(1-eta2)`

B

`v_esqrt(eta^2/5)`

C

`2/5v_esqrt(eta)`

D

`(2eta)/5v_e`

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The correct Answer is:
A
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