(a) when the displacement in shm is one-sixth the amplitude xm, what fraction of the total energy is kinetic energy? (b) what fraction is potential energy? (c) at what displacement, in terms of the amplitude, is the energy of the system half kinetic energy and half potential energy? (use any variable or symbol stated above as necessary.)

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