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 140
rce FRICTION. WORK AND ENERGY. 125 at the surface of the pulley, where a is the length of the arm asshown in Fig. 49 and r is the radius of the pulley. (b) Power is frequently measured electrically. Thus the powerin watts delivered by a direct-current dynamo is equal to theproduct of the… … Fig. 49. has come about that a given amount of work is often expressedas the product of power and time. The watt-hour is the amountof work done in one hour by an agent which does work at therate of one watt, the kilowatt-hour is the amount of work done inone hour by an agent which does work at the…
Mechanics · Heat
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