Kids are pelting a window with snowballs. On average, two snowballs of roughly 300-g mass hit the window each second, moving horizontally at some 10 m/s. The snowballs drop vertically to the ground after hitting the window.

Required:
Estimate the average force exerted on the window.

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?

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

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