1. The problem statement, all variables and given/known data To find the height of a cliff, you drop a rock from the top, and 10s later, hear the sound of it hitting the ground at the foot of the cliff. ignoring air resistance, how high is the cliff if the speed of sound is 330m/s 2. Relevant equations Xf = Xo +Vo(t) + 1/2at^2 Vf = Vo + at Vf^2 = Vo^2 + 2a(Xf - Xo) 3. The attempt at a solution I don't know how to account for the time it takes sound to travel. If I solve for Vf or Xf using these equations, then I get a number I know is for the ball being lower than the foot of the cliff. When I tried, using speed of sound, I don't know how long the sound is travelling, or how far it has to go.