While you are out riding your bicycle into the wind, the wind speed increases by a factor of 10, going from 2 to 20 mph. By roughly what factor will you have to increase your pedaling effort once the wind speed increases to 20 mph

Ithink d is the right answer. hope this !

The third hammer 8 pounds

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