Asked by Leslie

A satellite orbits the Earth with a radius of 7000km. The acceleration of gravity at this distance=8.17m/s/s.
How do I find the velocity of the satellite? I'm really struggling with finding the correct formula. I know the answer but can't figure out how to get there.
Thanks if anyone can help.
Answered by Scott
gravity is providing the centripetal force (keeping the satellite on a circular path)

a = v² / r

you have a and r, just make the units consistent (a to km OR r to m)
Answered by Annabelle
Sorry, I don't understatnd, and the answer doesnt compute to what is considered correct.
Answered by bobpursley
a=v^2/r where r is the distance from center Earth (re+altitude). solve for velocity
Answered by Annabelle
Thank you
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