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# lab3 - Kevin Boles Jacob Section 5 Equilibrium of...

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Kevin Boles Jacob Section 5 September 22, 2009 Equilibrium of Concurrent Forces Abstract: In the study of physics, the idea of force comes up most of the time. Understanding that concept is one of the most important things for a student studying physics should understand. One way of learning of concurrent forces would be by the use of a force table; this is a stand with various amount of weight hangers connected to it. This is used to examine the conditions for a particle to reach equilibrium under the influences of different coplanar forces. We use this information to study the analytical and graphical methods to examine this particle’s equilibrium further. Under the influence of three forces upon the particle, the net y-component was found to be 0.006 and the net x-component was found as -0.03 for the particle to reach its equilibrium. Under the influences of four different forces the particle reached equilibrium at the net x-component 0.0968 and the net y-component -0.0079. Theory: This experiment was a good experiment to use to analyze the physical qualities and to distinguish them even more from scalar quantities. It shows that we need to provide as much information as possible and sometimes we need to give even a little more than that. It also was a good way to describe vector addition and resolution, which are figured out by either the triangle Method of the Parallelogram Method. For the Triangle Method, we use this formula: R is the vector sum of A and B, its tail coincides with the tails of A and its head coincides with the head of B. If this is drawn out and all connected, a triangle is formed and if you were to solve this problem analytically you would need to use the laws of sines and cosines. For the Parallelogram Method we move vectors A and B so that both tails are at

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