1. The problem statement, all variables and given/known data - A guy sees a rock falling from a plateau. He estimates the last third (1/3) of the rocks fall to last for 1,3 sec. Air resistance doesn't need to be taken into consideration. - How far/what distance has the rock fallen? 2. Relevant equations None given 3. The attempt at a solution I was thinking of making a logarithmic equation out of it: f(x) = b*x^a, f(x) = distance travelled, b = ??, x = 1,3 sec or (1/3) ? and a = 9,82 m/s^2 I am by no means sure about this attempt. Thanks on beforehand.