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The kinetic energy needed to project a b...

The kinetic energy needed to project a body of mass `m` from the earth surface (radius R) to infinity is

A

`(mgR)/2`

B

2mgR

C

mgR

D

`(mgR)/4`

Text Solution

Verified by Experts

The correct Answer is:
C
The minimum kinetic energy required to project a body of mass m from the earth’s surface to infinite is know as escape energy. Therefore,
`KE=(GM_e m)/R=mgR (because gR=(GM_e)/R)`
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