Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 208
force applied at the extremity of a lever; a complete revolutionraises the weight the distance from the top of one thread to the top of the one above, orthe pitch. If the force be always exerted at right angles to the lever (Fig. 379), thelever may be considered the radius of a wheel, at the… … Fig. 377. Fig. 378. 192 MECHANICS. t-welfth of a foot, then the force would be to the weight as one twelfth is to 18-85; andif the force be one pound, the weight would be 32620 pounds. The resultant of two forces of exertion, as has been shown, is their sum, and counter- balances the force of…
Mechanical drawing
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