Analytical mechanics for students of physics and engineering . fa. CHAPTER IX. ENERGY. 150. Results of Work. — Consider the work done by theengine of a train in pulling it upgrade. The work done maybe divided into three parts: (a) Work done against frictional forces. (b) Work done against gravitational forces. (c) Work done against the kinetic reaction. The result of work done against frictional forces is amount of heat generated is proportional to the amountof work done. The heat may be utilized, at least theoreti-cally, to do work. Thus a part, if not all, of the originalwork may b
Analytical mechanics for students of physics and engineering . fa. CHAPTER IX. ENERGY. 150. Results of Work. — Consider the work done by theengine of a train in pulling it upgrade. The work done maybe divided into three parts: (a) Work done against frictional forces. (b) Work done against gravitational forces. (c) Work done against the kinetic reaction. The result of work done against frictional forces is amount of heat generated is proportional to the amountof work done. The heat may be utilized, at least theoreti-cally, to do work. Thus a part, if not all, of the originalwork may be recovered. The apparent result of the work done against the gravi-tational forces is the elevation of the train to a higher work done may be recovered by letting the train comedown to its former level and thereby do work. Thereforethe work done against gravitational forces may be consideredto be stored up. The apparent result of the work done against the kineticreaction in accelerating the train is an increase in the ve-locity of the train. The wor
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