8. Centripetal Forces & Gravitation

A satellite is in an elliptic orbit around the Earth (Fig. 8–51). Its speed at the perigee A is 8650 m/s.

(a) Use conservation of energy to determine its speed at B. .

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A satellite is in an elliptic orbit around the Earth (Fig. 8–51). Its speed at the perigee A is 8650 m/s.

(b) Use conservation of energy to determine the speed at the apogee C.

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Communications satellites are placed in circular orbits where they stay directly over a fixed point on the equator as the earth rotates. These are called geosynchronous orbits. The altitude of a geosynchronous orbit is 3.58 x 10^7 m (approximately 22,00 miles) . Astronomical data are inside the back cover of the book (b) Find the value of g at this altitude.

Communications satellites are placed in circular orbits where they stay directly over a fixed point on the equator as the earth rotates. These are called geosynchronous orbits. The altitude of a geosynchronous orbit is 3.58 x 10^7 m (approximately 22,00 miles) . Astronomical data are inside the back cover of the book (c) What is the weight of a 2000 kg satellite in a geosynchronous orbit?