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10.A 12.3 kg child jumps up and grabs a (round) horizontal tree branch that has a...

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Physics

10.A 12.3 kg child jumps up and grabs a (round) horizontal treebranch that has a diameter of 6 cm. The child grabs the branch 28cm from the trunk, and the weight of the child causes the branch tosag. If the shear modulus for the tree is 1.016 x106N/m2, how how much does thebranch sag when weighted?

11.Ropes for rock climbing have a diameter of 10.5 mm and aYoung's modulus of 8.72x107 N/m2. If a rockclimber of mass 82.4 kg falls when there is 45.8 m of rope out, howfar will the rope stretch?

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