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Motion In Straight Line

Question
CBSEENPH11017767

We can make an artificial satellite to revolve around the moon at a height of 50km from its surface but it is not possible to make an artificial satellite to revolve around the earth at a height of 50km from its surface. Explain why.

Solution
An artificial satellite can revolve around the moon at a height of 50km from its surface because the moon has no atmosphere.
The earth binds the atmosphere and its height is about 400km. Therefore, it is not possible to make an artificial satellite revolve around the earth at a height of 50km from its surface.
Due to air friction, the satellite will lose the energy and falls on the surface of the earth.