a ball of mass 522g starts at rest and slides down at a frictionless track. it leaves the track horizontally at 1.25m striking the ground 1m from the ramp. a. at what height above the ground does the ball start to move? b. what is the speed of the ball when it leaves the track? c. what is the speed of the ball when it hits the ground? is there even enough information to solve this equation?? i tried setting the equation up as mgh= .5mv^2 but i end up with 2 variables...i dont know what to do from there. plz help!