An empty office chair is at rest on the floor Consider the following forces Gravity Upward force exerted by the floor A net downward force exerted by air What forces are acting on the office chair?

Answer 1

All three of the forces are acting on the office chair.

Answer 2

The forces acting on the office chair are gravity pulling it downwards and the upward force exerted by the floor counteracting gravity to keep the chair at rest. The net downward force exerted by air will have a negligible effect and can be ignored in this scenario.