373_Physics ProblemsTechnical Physics

373_Physics ProblemsTechnical Physics - Chapter 12 P12.63...

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Chapter 12 375 P12.63 F y = 0: +− + = 380 320 0 N N F g F g = 700 N Take torques about her feet: τ = ++= 380 2 00 700 320 0 0 m N N . a f af x x = 109 . m FIG. P12.63 P12.64 The tension in this cable is not uniform, so this becomes a fairly difficult problem. dL L F YA = At any point in the cable, F is the weight of cable below that point. Thus, Fg y = µ where is the mass per unit length of the cable. Then, y dL L dy g YA ydy gL YA LL i ii = F H G I K J == zz 00 2 1 2 µµ y = ××
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