Find te equation of the line of action of the resultant of a system of coplanar forces
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A concurrent coplanar force system is one in which the lines of action of two or more forces all cross at the same spot. A parallel coplanar force system is made up of two or more forces that have all of their lines of action parallel. When simple beams are examined under gravity stresses, this is frequently the case.
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- If all of the forces are acting in the same direction, the resultant is produced by adding them together.
- If any of the forces are operating in the opposite direction, the resultant is calculated by subtracting that force from the equation.
- A single force may bring any contemporaneous group of forces that are not in equilibrium into equilibrium. The Equilibrant is the name for this force.
- It has the same magnitude as the resultant, is opposite in meaning, and is co-linear with it. The total of all forces equals zero when this force is added to the force system. A non-concurrent or parallel force system can be in equilibrium in terms of all forces but not in terms of moments.
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