1357

Physics Work,Power & Energy Level: High School

The work energy theorem and kinetic energy

A 7430 kg satellite has an elliptical orbit , as in the figure at “click here” . 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 figure . Suppose that the speed of the satellite is 2800 m/s at the apogee and 8550 m/s at the perigee .

(a) Find the work done by the gravitational force when the satellite moves from the apogee to the perigee .

(b) Find the work done by the gravitational force when the satellite moves from the perigee to the apogee