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## Homework Statement

Derive an expression for V

_{min}, the minimum speed the ball can have at point Z without leaving the circular path.

## Homework Equations

V≤(x/t)

V≤(2∏r)/(t)

V=√(GM

_{1})/(r)

## 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)=√(GM

_{1})/(r)

in the end i got t=2∏√(r

^{3})/(Gm

_{1})

it didnt make sense to me so i came here for help /: