The magnitude and location of the resultant active force on the wall is attached.
What is magnitude and location?
(The triangle's base can be any side.) The area is divided into two equal pieces by a parallel line drawn from the base at one-third of the triangle's height (A1=A2). The resultant force, which is equivalent to 12 w h2 (kN) in the example above, will consequently act at a location that is 1/3 the height from the base.
Therefore, walls can exert regular forces in the same way that floors can, but when this occurs, people start to become a little uneasy and things start to seem a little strange.
The two forces pulling on the brick are the downward gravitational pull of the earth and the upward normal force applied by the palm or hand to the brick. Clearly, the direction of these two forces is opposed.
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