Suppose that you lived on a planet with Earth’s mass (5.97×1024 kg) but only half its radius (that is, a radius of 3,189 km instead of 6,378 km). Suppose, too, that your own mass was 75 kg. a. What would your weight be on the surface of this hypothetical planet? (State your answer in both newtons and in pounds.)

b. What would the acceleration due to gravity be on the surface of this made-up planet? (State your answer in newtons per kilogram and compare it to the value on Earth’s surface.)

The answer is d) by requesting advice on science internet sites

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