A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 209
distance. If no energy were wasted in a machine, it would follow, from theconservation of energy, that the energy supplied must be equal totli«> energy delivered by the machine. Thus, referring to Fig. 211,Work done by P = Work done on W. Tins statemenl Is generally referred to as the principle… … MACHINES 185 wasted. The investigation of frictional resistances in the variouskinds of lubricated rubbing surfaces of machines is beyond thescope of this book. Usually, however, it is the determination of thetotal waste of energy in the machine which is of importance, andexperiments having this…
Physics
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