Derive an expression for Vmin, the minimum speed the ball can have at point Z without leaving the circular path.
The Attempt at a Solution
I set 2∏r = to x since its in a circle. i then had V≤(2∏r)/(t)
then i had (2∏r)/(t)=√(GM1)/(r)
in the end i got t=2∏√(r3)/(Gm1)
it didnt make sense to me so i came here for help /: