Which would best describes what occurs when a ball is thrown against a wall? a) the ball will not bounce off the wall. b) the ball hits the wall hard enough to bounce off of it. c) the wall is stronger than the ball and neither exerts any forces. d) the ball exerts a force on the wall and the wall exerts a force back.

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.