Determining Acceleration from Knowledge of Individual Force Values.Determining the Net Force from Knowledge of Individual Force Values.If so, use the following links to Unit 2 sub-lessons. Perhaps you would wish to review these lessons before proceeding through the remainder of Unit 6. Such force analyses were presented in Unit 2 and elaborately discussed. A free-body diagram is a vector diagram that depicts the relative magnitude and direction of all the individual forces that are acting upon the object. The process of analyzing such physical situations in order to determine unknown information is dependent upon the ability to represent the physical situation by means of a free-body diagram. And the magnitude of any individual force can be determined if the mass of the object, the acceleration of the object, and the magnitude of the other individual forces are known. Subsequently, the acceleration of an object can be found if the mass of the object and the magnitudes and directions of each individual force are known. Furthermore, the net force must be equal to the mass times the acceleration. The idea was that if any given physical situation is analyzed in terms of the individual forces that are acting upon an object, then those individual forces must add up as vectors to the net force. In Unit 2 of The Physics Classroom, Newton's second law was used to analyze a variety of physical situations. The law is often expressed in the form of the following two equations. Newton's second law states that the acceleration of an object is directly proportional to the net force acting upon the object and inversely proportional to the mass of the object.
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