ch12-p060 - 60. (a) If L (= 1500 cm) is the unstretched...

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60. (a) If L (= 1500 cm) is the unstretched length of the rope and Δ L = 28 .cm i s t h e amount it stretches then the strain is Δ LL /. / . == × 2 8 1500 19 10 3 cm cm bg b g . (b) The stress is given by F / A where F is the stretching force applied to one end of the rope and A is the cross–sectional area of the rope. Here F is the force of gravity on the rock climber. If m is the mass of the rock climber then
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