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

question 21

Multiple Choice

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.