1. The problem statement, all variables and given/known data Consider a bungee jumper of mass 75kg, with a 9.00-m Cord tied to his ankles. The spring constant of the cord is 150 N/M. The jump of point is 9.00m. Set origin to where the cord becomes taunt. At what point dose the jumper attain maximum speed? What is the value of the max speed? At what point dose the jumper attain maximum acceleration? What is the maximum acceleration? 2. Relevant equations x>0 x=mgx x<0 x=mgx+ (1/2)kx2 (1/2)mv2 3. The attempt at a solution I set second equation to zero took the derivative and solved to find the point x where the potential energy is lowest and then set the potential energy equal to the kinetic energy at that point and solved for v. I can also use the max kinetic energy to solve for the max stretch in the cord, but I am lost in how to solve for the acceleration. Any advice?