1. The problem statement, all variables and given/known data "A satellite orbits the earth in a circular orbit of radius r. If the orbital speed of the satellite is v, what is the orbital period T of the satellite in terms of v and r? You must explain how you derive the expression for the period." 2. Relevant equations Speed = distance/time a = v2/r 3. The attempt at a solution Distance for 1 revolution of a circle is equal to the circumference. So distance = 2(pi)r Time to travel 1 revolution = period T So velocity = speed = 2(pi)r/T a = v2/r a = 2(pi)r/T * 1/T a = 2(pi)r / T2 At this point I would solve for T, but I am not sure if this is valid, what I'm doing? I don't think we are supposed to have an acceleration in there, so I was wondering if there is another equation I could use that relates v and r. Btw this is not graded, it's just a sample test (that we're not turning in) to help us for the real test (on Tuesday). Thanks for any assistance.