The simplest type of roof truss is a triangle. The truss shown in the figure is used to frame roofs of small buildings. If a 100-pound force is applied at the peak of the truss, then the forces or weights W₁ and W₂ exerted parallel to each rafter of the truss are determined by the following linear system of equations.

Solve the system to find W₁ and W₂.

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V3 (W, + W) = 100 2 W, – W2 = 0 www 100 lb W1 W2 60° 60°