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A body of mass m is to be moyed to infin...

A body of mass m is to be moyed to infinity from the earth's surface. If R is the radius of the earth, then the kinetic energy that should be imparted to the body is

A

infinity

B

mgR

C

2mgR

D

`(mgR)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`K.E.=(1)/(2)mV_(3)^(2)=(1)/(2)m(sqrt(2gR))^(2)=mgR`
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