In an experiment, two baseballs are dropped from the top of a tall building. When the first baseball is dropped, a timer is started. After 1.0 second, the second baseball is dropped. Assuming air resistance can be neglected, which of the following will be true A) The difference in velocity between the two baseballs decreases as they fall.
B) The difference in velocity between the two baseballs remains constant as they fall.
C) The distance between the baseballs decreases as they fall.
D) The distance between the baseballs stays constant as they fall.

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