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The escape velocity of a projectile from...

The escape velocity of a projectile from the earth.s surface is given by the formula (R `to` radius of the earth and .g. is acceleration due to gravity)

A

`sqrt(2gR)`

B

`sqrt(gR)`

C

`sqrt(g/R)`

D

`sqrt((gR)/2)`

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The correct Answer is:
A
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