Question

Suppose a man is sitting on a chair and exerting 100 N of force downward, while a spring beneath the chair exerts 150 N of force upward. If you assign a negative value to the downward force, what is the net force of this system?(1 point)
Responses

50 kg
50 kg

50 N
50 N

-50 N
-50 N

250 N

Answer 1

Net force = upward spring (150 N) + downward man (-100 N) = 150 N + (−100 N) = +50 N. So the net force is 50 N upward.