Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 339
instance, to any height,the labor of many men would be required to elevate thenecessary materials in a vertical direction, whereas thatof a few accomplishes the same end over a ramp orinclined plane whose slope is sufficiently gentle to admitthe easy passage ofmen, horses, carts, &c.Burdens are… … MECHANICS OF SOLIDS. 335 to zero, that is by F = W(sin a + /cos a). Multiplying both members by AB, the distance throughwhich F is exerted, we have, F x A B = W [A B sin a + f.AB cos a]-which reduces to F x AB = W.BG + f.W.A 0.. (104). its quantity ofwork ; The first member is the quantity of work…
Mechanics · Acoustics · Optics
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