Mechanics and heat; a text book for collleges and technical schools (1916)
Franklin, William S. (William Suddards), 1863-1930, Macnutt, Barry, 1878-1936, [from old catalog] joint author · New York, The Macmillan company; London, Macmillan & co., ltd. · leaf 148
r bringing thesystem back to its initial state by a smaller expenditure of work.The usual statement of the principle of the conservation ofenergy is that energy can neither be created nor destroyed; but thisstatement is so completely abstracted from actual physical con-siderations that it is almost… … placement whatever a certain total amount of work (called virtualwork) would be done by the forces. This virtual work is equal tozero when the forces are in equilibrium. Thus, Fig. 51a representsa body in equilibrium under the action of the three forces A, B 134 ELEMENTS OF MECHANICS. and C. If the…
Mechanics · Heat
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