# Orbital Transfers

Answer the following questions. Mark on the screen. You may change

#1 Suppose the spaceshuttle is in circular orbit about the Earth, located at point O in the drawing. When the shuttle reaches point A in its orbit, it deploys a satellite straight out ahead of it. Which choice shows what the new orbit of the satellite looks like?

 a. b. c. d.

#2 NASA has planned an unusual fuel-saving maneuver to drop a satellite, initially in circular orbit about the Earth (Point O), straight down onto the Earth. To accomplish this, a double-thrust maneuver will be used, and the trajectory will be as shown in the figure. Which of the following choices best describes the maneuver?

a. The satellite brakes slightly at A and then again at E.
b. The satellite speeds up at A and brakes to 0 speed at E.
c. The satellite brakes at B and brakes to 0 speed at D.
d. The maneuver is impossible.
e. None of these.
#3 Suppose a satellite (msatellite = 800 kg) is in a circular orbit 200 km above the surface of the Earth. How much energy is required in order to boost the satellite into a circular orbit 400 km above the surface of the Earth?

a. 1.3 x 104 J
b. 7.1 x 108 J
c. 4.0 x 1011 J
d. 8.0 x 1011 J