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If v(i) and v(f) represent the initial a...

If `v_(i) and v_(f)` represent the initial and final speeds of projection, then represent the difference of K.E in terms of difference of P.E.

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`1/2m(v_(i)^(2)-v_(f)^(2))=(GMm)/((R+h))` . Further if h = 0 and then `1/2m(v_(i)^(2)-v_(f)^(2))=(GMm)/((R+h))`
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