Some people worry that the increasing number of cell phones will cause cancer because of the energy of the radio waves they emit. Cell phones are a new technology
that only recently became widely used. And because cancer takes years to develop, the
amount of risk is not yet known.
Research this issue, and summarize what's known so far. In your summary, include
information about the energy of radio waves. Be sure to only use credible sources.
Based on what you learned from your research, do you think people should limit their
cell phone use? Why or why not?

As newton's first law states a object in motion stays in motion

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