Q.

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

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a

mgR/2

b

2 mgR

c

mgR

d

mgR/4

answer is C.

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Detailed Solution

12mve2=12m  2gR=mgR
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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Best Books for NEET
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