1. A student finds that it takes .20s for a ball to pass through photogates places 30cm apart on a level ramp. The end of the ramp is 92cm above the floor. Where should a coin be placed so that the ball strikes it directly on impact with the ground? 2. ΔX=ViTf+1/2 ATf^2 v= ΔX/ΔT 3. Tf=.2s h=92cm (.92m) I don't understand why the 30cm is there or how to complete the problem.