A92.0-kg skydiver falls straight downward with an open parachute through a vertical height of 325 m. the skydiver's velocity remains constant. what is the work done by the nonconservative force of air resistance, which is the only nonconservative force acting? (assume that up is the positive direction.) a. +2.93 times 10^5 j b. 0j c. answer is not obtainable, because insufficient information about the skydiver's speed is given. d. -2.93 times 10^5 j