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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 eath surface (radus R) to infinity is

A

`mgR//2`

B

`2mgR`

C

`mgR`

D

`mgR//4`

Text Solution

Verified by Experts

The correct Answer is:
C
`K_(1)+U_(1)=K_(2)+U_(2)`
`K_(1)-(GMm)/R=0+0 implies K_(1)=(GMm)/R=mgR`
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