The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 135
° — .3907 P r= 10 X .3907 = 3.907 cwts. Ques. 44. Required the least traction, when the weightDf the mass is 9 cwt., and the rubbing surfaces are softcalcareous stone upon the same, and the limiting angle ofresistance = 36°..30. JSTatural sine of 36°..30 Least traction 1= 5.3532 cwt. .59489 Ques.… … Let W be a body moved on the plane A C, then by theresolution of pressures, the pressure of W on the plane =W COS. A ; W qmn, being the parallelogram of pressures,and since W n is perpendicular to A C, and mn parallel PRACTICAL MECHANICS. 131 to it, the angle m W n = the angle A ; therefore, the…
Mechanics, Applied
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