Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 278
of the bell,several cords G, uponeach of which a manmay pull. It wouldbe difficult to estimatethe work performedby each man, becausehis effort, as well inintensity as direction,varies at each instant;but there is a generaltension exerted uponthe main rope, and the quantity of work of this tension… … example of thebell-ropes; 271 NATURAL PHILOSOPHY. it. The perpendicular components must be in equilibrio,while the parallel components are alone effective in pro-ducing useful work. The perpendicular components onlyproduce fatigue, andexhaust uselessly the •strength of the men. FlS- 157- effect of…
Mechanics · Acoustics · Optics
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