escape velocity on earth is 11.2km/s

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escape velocity on earth is 11.2km/s

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potential energy=-GMeM/Re

ESCAPE ENERGY=POTENTIAL ENERGY+KINETIC ENERGY=0

SO

KINETIC ENERGY=-POTENTIAL ENERGY

1/2MV2=GMeM/R

V2=2GMe/R

NOW GRAVITATIONAL ACCELERATION=GMe/R2

V2=2gR

SO ESCAPE VELOCITY IS THE VELOCITY AT WHICH THE OBJECT IS THROWN OUT OF GRAVITATIONAL FIELD

FOR EARTH IT IS 11.2KM/S