Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed about the Moon would be
A)less than 8 km/s.
B)more than 8 km/s.
C)about 8 km/s.

Question

Quizplus · Accepted Answer

The minimal orbit speed about the Moon is less than the minimal orbit speed about Earth because the Moon's gravitational force is weaker than the Earth's gravitational force. Therefore, a spacecraft needs less velocity to maintain a stable orbit around the Moon.

Minimal Orbit Speed About Earth Is About 8 Km/s