Orbit explorer web app http://scisyn.com/umuc/launch/orbit.html

A. At the launch distance of 8500 km what launch speed is needed to achieve a circular orbit? (Hint: a circular orbit has an eccentricity=0.000) Please note that this will require patience and some trial and error to get the right answer. Try different speeds until a circular orbit is obtained (eccentricity=0.000). If a range of speeds leads to a circular orbit then list that range. Submit screenshot.

B. In general, what do you notice about the spacing between the "yellow dots" for a circular orbit?

C. Is the speed changing for a circular orbit?

D. Is the velocity changing for a circular orbit?

E. What force is acting on the Earth-orbiting satellite? And in what direction? Explain how Newton's first law on motion tells you a force is acting on the probe.

F. What is the direction of the acceleration? Why doesn't this acceleration affect the speed?

G. Does KE change at any time in orbit?

H. Does PE change at any time in orbit?