5. where would a roller coaster have the greatest potential energy? a. at the top of a hill b. halfway up the hill c. halfway down the hill d. at the bottom of the hill

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.