1. The problem statement, all variables and given/known data http://members.shaw.ca/code/balls.JPG" 2. Relevant equations I'm not sure what equations to use here, or even wether or not I need to use calc. Unfortunately we just started dynamics and most students don't know how to integrate yet (including me) v = dx/dt a = dv/dt = d2x/dt2 = v dv/dx Uniform rectilinear motion: x = x0 + vt Uniformly accelerated rectilinear motion: v = vo + at ; x = xo + vot + 1/2at2; v2 = v2o +2a(x-xo) where o in all the above = initial. 3. The attempt at a solution I don't even know where to start with this one. hence my question for help. We know that a = 9.81m/s2 and also that every .5 second there is a ball dropped. Do i have to integrate anything?