A particle falls towards earth from infinity. It’s velocity on reaching the earth would be
A particle falls towards earth from infinity. It’s velocity on reaching the earth would be
Infinity
$\sqrt {2gR} $
$2\sqrt {gR} $
Zero
A particle falls towards earth from infinity. It’s velocity on reaching the earth would be
This should be equal to escape velocity i.e.$\sqrt {2gR} $
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