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  4. A particle falls towards earth from infinity. Its velocity on reaching the earth would be :

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Q. A particle falls towards earth from infinity. Its velocity on reaching the earth would be :

MGIMS WardhaMGIMS Wardha 2004

Solution:

If a particle falls towards the earth from infinity, then velocity on reaching earth $ \upsilon =\sqrt{2gR} $ where $ R= $ radius of earth.