1. The problem statement, all variables and given/known data 2. Relevant equations Famous Five 3. The attempt at a solution To be honest, I don't know where to start. I've picked an approach by trying to find the acceleration (it says that it is constant), but every time I do, the acceleration won't give me the displacement at each given time interval. I've assumed that there was no initial velocity since the machine looks like it just let the rock fall.