1. The problem statement, all variables and given/known data An object of mass M on a string is whirled in a horizontal circle. When the string breaks, the object has the speed v0, the circular path is radius R, and the height of the object above the ground is h. In terms of h, v0, and g, what is the time it takes for the object to hit the ground? 2. Relevant equations h = v0t + gt^2/2 3. The attempt at a solution I honestly don't know where to begin. I have the equation, and need to solve for time (t) but don't know how to get that variable isolated. Is there some other formula I need?