how much is escape velocity?
lipi:
escape velocity on earth is 11.2km/s
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the escape velocity is the velocity with which an object is to be projected to overcome the gravitational pull of the earth
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escape energy is the energy at which the object is thrown out of gravitational field
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
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
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