A body is projected from the surface of the earth. The velocity of the body at a height of 3r
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Oh and btw the answer is 31/2 ve :)
And a correction, the potential energy will be GMm/R not GMm/R2.
Use ve in place of GMm/R when you equate the two equations and the entire equation shall be in terms of Ve and V1 which you are supposed to calculate and then you’ll get your answer :)
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