1. The problem statement, all variables and given/known data A rock is thrown horizontally from a cliff with a speed of 15 m/s. It falls half of the heigh of the cliff in the last three seconds of its fall. What is the total fall time? 2. Relevant equations The Kinematic Equations 3. The attempt at a solution Well heres what I have so far but I dont know what its getting me. Vi=Initial Velocity Vo=Halfway Down Cliff Velocity Vf=Final Velocity Y=Height of cliff t=time Vf+29.4=-9.8t Y=.5(0+Vo)t Y=.5(Vo+Vf)3 Y=-4.9t^2 Y=Vo(-88.2) These were all derived from kinematic eqautions.