jill is pushing a box across the floor. which represents the upward force perpendicular to the floor?\no…

jill is pushing a box across the floor. which represents the upward force perpendicular to the floor?\no $f_{p}$\no $f_{f}$\no $f_{n}$\no $f_{g}$
Answer
Brief Explanations:
In physics, the normal force ($F_N$) is the upward force perpendicular to a surface. When a box is on the floor, the floor exerts a normal force on the box to counter - act the force of gravity pulling the box downwards.
Answer:
C. $F_N$