Application of Newton's LawsFORCE EQUILIBRIUMRev. 0Page 11CP-04FORCE EQUILIBRIUMKnowledge of the forces required to maintain an object in equilibrium is essential inunderstanding the nature of bodies at rest and in motion.EO 1.4STATE the conditions necessary for a body tobe in force equilibrium.EO 1.5DEFINE the following:a.Net forceb.EquilibrantNetForceWhen forces act on an object, the result may be a change in the object's state of motion. Ifcertain conditions are satisfied, however, the forces may combine to maintain a state ofequilibrium or balance.To determine if a body is in equilibrium, the overall effect of all the forces acting on it must beassessed. All the forces that act on an object result in essentially one force that influences theobject's motion. The force which results from all the forces acting on a body is defined as thenet force. It is important to remember that forces are vector quantities. When analyzingvarious forces you must account for both the magnitude (displacement) of the force as well asthe direction in which the force is applied. As described in the previous chapter, this is bestdone using a free-body diagram.To understand this more clearly, consider the book resting on the table in section A ofFigure 5.
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