Question

why is III incorrect?

69. A woman stands in an elevator. The force of gravity exerted on the woman by the Earth is 500 newtons. If the elevator is accelerating upward, which of the following forces would have a magnitude of 500 newtons? 1. The force exerted on the Earth by the woman Il. The force exerted on the woman by the floor of the elevator ll. The force exerted on the floor of the elevator by the woman (A) Iony land !l only li and ill only I, II, and Ili (c) (D) (E)

Answer 1

force exerted on the floor of the elevator by the women is equal to force by floor on women (action reaction pair) which is equal to weight of women + (mass x acceleration ) of women