Escape Speed: a Satellite Is in Circular Orbit at an Altitude

Escape speed: A satellite is in circular orbit at an altitude of 1500 km above the surface of a nonrotating planet with an orbital speed of 9.2 km/s. The minimum speed needed to escape from the surface of the planet is 14.9 km/s, and G = 6.67 × 10^-11 N ∙ m²/kg². The orbital period of the satellite is closest to

A) 72 min.
B) 65 min.
C) 58 min.
D) 51 min.
E) 44 min.

Correct Answer:

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