The book Key And Supplement to Elementary Mechanics was written by author De Volson Wood Here you can read free online of Key And Supplement to Elementary Mechanics book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Key And Supplement to Elementary Mechanics a good or bad book?
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99 To find AE '; in the right-angled triangle DAB we have A D tang B = = i = 0-666 + ; . -. B = 33 41'. Then AE = AB sin B = 3-327 + inches. Substituting above gives 24 x 20 2. Taking the origin of moments at D we have P ^ ~ 20 x 24 10A . , : - = 120 Ibs. 3. Taking the origin of moments at B we have W. BC^F. AB, or PAGE 116. 4. If t = TF, we have 100 KEY AND SUPPLEMENT or = AC. From the right-angled triangle AEB we have sin 45 C substituting, AC 5. Taking the origin of moments at A we have t x ...AC= BE x W. But from the example DB=2AB, 6 = 45, TF= Ibs. From the figure BE- AB sin 45 = $V2 AB = 0-7071AB. BE AB sin 45 . -. 9> = 20 42' 17". To find A C we have from the figure AC=AB&\nABC = J# sin (0 - cp) TO ELEMENTARY MECHANICS. 101 = AB sin 24 17' 43" = 04115 AB. Substituting in the first equation above gives Q. 7071 x 50 04115 = 85-97 + Ibs. To get the compression on the bar, take the origin of moments at D, in which case the moment of the tension will be zero. The perpendicular from D upon AB prolonged will be AD sin #, and from D perpendicular upon the vertical through B will equal BE = AB sin 6 ; hence we have calling c the compression c.
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