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A satellite revolves around the earth in...

A satellite revolves around the earth in an elliptical orbit. Its speed is

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Data : `G = 6.67 xx10^(-11) N.m^(2)//kg^(2), M= 6xx 10^(24) , kg , R = 6400 km = 6.4 xx 10^(6) m`
Critical speed, ` v_(c) = sqrt((GM)/(R+h))`
As the orbit of the satellite is close to the Earth's surface, h is neglible compared to R.
` v_(c) = sqrt((GM)/R = sqrt((6.67xx10^(-11) xx6 xx10^(24))/(6.4 xx 10^(6)) = 7.908 xx 10^(3) m//s `
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