Calculating centripetal acceleration between moon and satelite

[okgo]

Homework Statement

http://www.screencast.com/users/trinhn812/folders/Jing/media/e79a7b88-f71e-4790-a35c-7bc0c3e03ec8
Answer key is marked

Homework Equations

F=gMm/r^2 =ma=mv^2/R

The Attempt at a Solution

So does gMm/r^2 also measure centripetal acceleration?

 

[collinsmark]

The Attempt at a Solution

So does gMm/r^2 also measure centripetal acceleration?

Not quite, but you are on the right track. $$GMm/r^2$$ is a measure of force. Technically to find the acceleration, set it equal to ma and, solve for a. Then, to solve your original problem, note how a varies with r.