Question

A 48 kg girl is standing on a chair. What is the force exerted by the chair?

Answer 1

Weight of the girl and the chair (480N)

Answer 2

Since the chair is preventing the girl from touching the ground, The chair is exerting the force onto the girl (upwards), 

and the amoutn of force would be

F = mass x gravity

F= 48 x 9.8

F = 471 N

So the answer would be 471 N upwards