State the definition for the gravitational potential at a point.
Explain why gravitational potential is always negative.
A satellite orbiting the moon, M, is moved from orbit A to orbit B, as shown in Figure 1.
Figure 1
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The gravitational potential due to the moon of each of these orbits is:
Orbit A: –2.10 MJ kg–1
Orbit B: –1.65 MJ kg–1
Calculate the gravitational potential difference as the satellite moves from orbit A to orbit B.
The satellite has a mass of 950 kg.
Calculate the work done in moving the satellite from orbit A to orbit B.
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