When an object is pushed across a surface, what two forces act upon it?

Question

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Answer 1

Actually, there are 4 forces acting on it.

 

(1)  The downward force of gravity

(2)  The upward normal force of the surface on the object

(3)  The applied force pushing it across the surface

(4)  The resistive force of friction opposing the sliding of the body across the surface

Answer 2

Gravity and friction