Gravitation

A satellite orbits the earth at a height of 400 km above the surface. How much

energy must be expended to rocket the satellite out of the earth’s gravitational

influence? Mass of the satellite = 200 kg; mass of the earth = 6.0×1024 kg; radius of

the earth = 6.4 × 106

 m; G = 6.67 × 10–11 N m2 kg–2

.