Question

If an object weighs 20 N and is sitting on the floor without moving, what must be the normal force of the floor acting on the box?

20 N up
20 N down
10 N up
10 N down

Answer 1

20 N up

Step-by-step explanation:

Since the object on the floor is sitting still. Based on Newton's law of force. Objects must have equal reaction and force against each other for still objects. So the answer is 20 N up. Since the force are equal on both sides making the object not moving.