57 SSMREASONINGThere are four forces that act on the chandelier; they are the forces of tension Tin each of the three wires, and the downward force of gravity mg. Under the influence of these forces, the chandelier is at rest and, therefore, in equilibrium. Consequently, the sum of the xcomponents as well as the sum of the ycomponents of the forces must each be zero. The figure below shows the free-body diagram for the chandelier and the force components for a suitable system of x, yaxes. Note that the free-body diagram only shows one of the forces of tension; the second and third tension forces are not shown. The triangle at the right shows the geometry of one of the cords,
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