1. The problem statement, all variables and given/known data s is the position of a particle along the s-axis, find an expression for the velocity and acceleration and determine when v=0 s=1-3t^2 2. Relevant equations v=ds/dt , a=dv/dt 3. The attempt at a solution No idea where to begin, my book is not very clear. Do I just set v=0 equal to s = 1-3t^2? I know the answer is v=-6t but do not know where to begin - thanks!