Answer:
500N upward
Explanation:
The person and the elevator have velocity, but it only gives them kinetic energy. The elevator is moving downward at a constant speed, mean that the acceleration is zero. We can assume that the person also has zero acceleration so that the force that works on the person is only gravity. Action is equal to reaction, if the gravity force from the person is 500N downward then the reaction comes from the floor will also be 500N upward.
