A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 158
Find, in terms of BD. the tension in the cord and thereactions communicated across the joint at A. First consider ABC to be a rigid body, acted upon by vertical forces ofl<>, tO and 10 lb.-weight. together with the reactions P and Q. Then P+Q-10-40-10=0; ,\ P+Q = 60 (1) EQUILIBRIUM OF… … Fig. 159. —Equilibrium of two rods. Draw AF perpendicular to BC, then, in the similar triangles BED, BFA,we have BE BF 2 bdba^B .\ BE = iBD;.. CE=4-?;BD.Hence, from (2) and (3), P = 10 +10(4 •(4) £BD) = 50 -^ BD And Q=50-10(4-?.BD) = 10 + \PBD (5) Now consider the bar AC separately (Fig. 159…
Physics
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