A 7350 kg satellite has an elliptical orbit. The point on the orbit that is fart

Question

A 7350 kg satellite has an elliptical orbit. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. The point on the orbit that is closest to the earth is called the perigee and is at the far left side of the drawing. Suppose that the speed of the satellite is 2750 m/s at the apogee and 8600 m/s at the perigee. (a) Find the work done by the gravitational force when the satellite moves from the apogee to the perigee. ________ J (b) Find the work done by the gravitational force when the satellite moves from the perigee to the apogee. ________J

Explanation / Answer

Work done is = change in kinetic energy => Work done while going from Apogee to Perigee = 0.5m(8600^2-2750^2) = 2.44 *10^11 J Since the Kinetic energy change is negative of (a) b) Answer = - 2.44 *10^11 J

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