Final answer:
Calculating the net force on a skydiver involves subtracting the upward force of air resistance from the downward gravitational force. None of the given answer choices correctly match the calculated net force, indicating an error in the choices or calculation.
Step-by-step explanation:
The question asks for the net force on a skydiver who is falling straight down with air resistance exerting a force on him. To find the net force, we start by considering the two main forces acting on the skydiver: gravitational force (weight) and air resistance. The gravitational force is equal to the mass of the skydiver times the acceleration due to gravity, which is 113 kg × 9.8 m/s² = 1107.4 N directed downwards. The air resistance is given as 660 N directed upwards. The net force can be found by subtracting the force of air resistance from the gravitational force: 1107.4 N - 660 N = 447.4 N directed downwards. Since this value is not one of the given choices, it appears there might be a mistake either in the calculation or in the provided options.