The tire on a bicycle is filled with air to a gauge pressure of 744 kpa at 20◦c. what is the gauge pressure in the tire after a ride on a hot day when the tire air temperature is 65◦c? (assume constant volume and a constant atmospheric pressure of 101.3 kpa.) answer in units of kpa.

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j