When a football is kicked, the action and reaction forces do not cancel each other out because
a
they are equal and opposite, but they do not occur at the same time.
b
they act on different objects (the kicker's foot and the ball).
c
the kicker's force on the ball is greater than the ball's force on the kicker.
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домео

The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm