Astone is dropped from a bridge and hits the pavement below in two seconds. what is the velocity of the stone when it hits the pavement?

a. 0.20 m/s
b. 19.6 m/s
c. 4.9 m/s
d. 9.8 m/s

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.