A Satellite revolving around earth's orbit an object of m mass is asserted from satellite is such that it's escape velocity the gravitation pull of the earth if the speed of satellite we find k.E of the object at the instant of ejection
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At height r from center of earth. orbital velocity
=
r
GM
∴ By energy conservation
KE of
′
m
′
+(−
r
GMm
)=0+0
(At infinity, PE=KE=0)
⇒KE of
′
m
′
=
r
GMm
=(
r
GM
)
2 m=mv ².
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