A building has a symmetric roof made from two straight sections at an angle of 20�‹ above the horizontal. The sides are uniform and have a mass of m = 1800 kg. Find the magnitude of the horizontal force that this roof exerts at the top of the wall, pushing it outward. Before you start your calculation, draw a free body diagram of one side of the roof and label relevant distances.
Im not sure if I even know what it looks like. maybe something like this?:
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Even if it is right, i have no clue on how the forces react in this situation. Please help!