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What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?

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.