Question

If you push on a wall, why will your hand not go through the wall?

Answer 1

Standing on the ground, you push on the ground with a force due to gravity (Fg down) and the ground pushes back on you (FN up).

Answer 2

FN is the normal force.
It balances out the force due to gravity down.
The normal force is always perpendicular to the surface the object is on.
Without it there would be a net force down on you and you would accelerate down.
This is an example of an action-reaction pair, two forces that are equal but opposite to each other.

Answer 3

Thank you

Answer 4

Your welcome. Hoped it helped!