00:01
In this problem, we're given two artificial satellites with equal masses in circular orbits around the earth.
00:08
Okay, we're also given that r2 is greater than r1.
00:12
So if this is our earth, then we have two orbits.
00:16
Here's orbit one, orbit two.
00:19
This is r1, and this could be r2.
00:23
Now, we want to set our centripetal force equal to our gravitational force, and doing so we find our initial speed to be, g times the mass of the earth divided by the radius.
00:36
So as we can see our speed is proportional to one over the square root of the radius.
00:43
But since r2 is greater than r1, then that means v0 2 is less than v0 for 1...