18. A 5.00 X 102 kg communication sateliite is to be placed into a circular geosynchronous orbit around Earth.

a) What is the radius of the sateliite's orbit? [3 marks]

b) What is the gravitational potential energy of the satellite when it is in geosynchronous orbit? [3 marks]

c) What is the total energy of the satellite when it is in geonsynchronous orbit? [3 marks]

d) How much work must the launch rocket do to place it into orbit? [3 marks]

e) Once in Orbit, how much additional energy would the saletllite require to escape from Earth's potential well? [2 marks]