- 38

- 0

**1. Homework Statement**

Calculate at what height above the earth's surface a satellite must be placed if it is to remain over the same geographical point on the equator of the earth. What is the velocity of such a satellite?

**2. Homework Equations**

v = sqrt(G*m / r)

**3. The Attempt at a Solution**

At first I thought the velocity of the satellite would have to be the same as the earth, but since r is different the velocity must also be different. I have 2 unknowns for the satellite, the velocity and r, and can't figure out what to do now.

Thanks for your help.