Solution
= Solution
The orbit is \b[circular for $\boxed{k=1}$]. The speed equals $\sqrt{GM_E/r_0}$ and radial acceleration balances the changing direction of the velocity.
= Solution
The orbit is \b[circular for $\boxed{k=1}$]. The speed equals $\sqrt{GM_E/r_0}$ and radial acceleration balances the changing direction of the velocity.