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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's surface to infinity is (R is radius of the earth, g is gravitational acceleration on the surface of the earth)

A

`(1)/(4)mgR`

B

`(1)/(2)mgR`

C

mg R

D

2 mg R

Text Solution

Verified by Experts

The correct Answer is:
c
`"BE "=("GMm")/(R)=(gR^(2)m)/(R)=mgR.`
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