A satellite used in a cellular telephone network has a mass of 1890 kg and is in a circular orbit at a height of 820 km above the surface of the earth.
What is the gravitational force on the satellite?
Take the gravitational constant to be = 6.67×10^-11 Nm^2/kg, the mass of the earth to be = 5.97×10^24 kg, and the radius of the Earth to be = 6.38×10^6 m.