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A particle is released from height S fro...

A particle is released from height S from the surface of the earth. At a certain height its KE is three times its PE. The height from the surface of earth and the speed of the particle at that instant are resp.

A

`S/2, sqrt(3gS)/2`

B

`S/4, sqrt((3gS)/2)`

C

`S/4, (3gS)/2`

D

`S/4, sqrt(3gS)/2`

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