# 6.An artifical satellite of mass 200 kg revolves round the earth in an orbit of average radius of avaerage radius 6670km. calculate the orbital KE, gravitational potential energy and total energy of the satellite in the orbit.Given mass of earth =6.4*10^34kg, G=6.67*10^-11Nm^2/kg^2   7.world's first man made artificial satellite sputnik I was orbiting the earth at a distance of 900km.Calculate its velocity. radius of earth=6370km. g=9.8m/s^2.

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