Physics
posted by Lila .
A rock of a mass 0.2kg is attatched to a 0.75m long string and swung in a vertical plane. What is the slowest speed that the rock can travel and still maintain a circular path.
so, i started with the following equation: Fc= mv2/r
but where do i go from there to solve for v (what can i change Fc to? )


so are you suggesting that there is no tension when the rock is at the top of the circle?

no tension at the absolute minimum velocity.

okay, thanks !