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A satellite travels around Earth in uniform circular motion at altitude 35836 km above Earth's surface. The satellite is in geosynchronous orbit (that is, the time for it to complete one orbit is exactly one day). In the figure below , the satellite moves counterclockwise (ABCDA). State directions in terms of the x- and y-axes.

(a) What is the satellite's instantaneous velocity at point C?

km/s in the -y-direction

(b) What is the satellite's average velocity for one quarter of an orbit, starting at A and ending at B?

km/s at 45° above the -x-axis

(c) What is the satellite's average acceleration for one quarter of an orbit, starting at A and ending at B?

m/s2 at 45° below the -x-axis

TO SEE FIGURE:

http://www.webassign.net/grr/chapter-05/fig-018.gif