The escape velocity from earth is ves. A body is projected with velocity 2ves with what constant velocity will it move in the inter planetary space

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ves

3ves

5ves

answer is C.

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Detailed Solution

Velocity of body in inter planetary space v'=v2−ves2where ves= escape velocity and v = velocity of projection∴ v′=2ves2−ves2=3ves2⇒v′=3ves

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