# physic

A satellite used in a cellular telephone network has a mass of 2010kg and is in a circular orbit at a height of 770km above the surface of the earthTake the gravitational constant to be G = 6.67×10−11N⋅m2/kg2 , the mass of the earth to be me = 5.97×1024kg , and the radius of the Earth to be re = 6.38×106m .
What fraction is this of the satellite's weight at the surface of the earth?
Take the free-fall acceleration at the surface of the earth to be g = 9.80m/s2

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1. Tehe

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2. (Gm1m2)/r^2
so
(6.67x10^-11)(2010)(5.97x10^24)/[(6.38x10^6)+770000]^2
note: 770km = 770000m

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