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10.1 The elasticity of a cylindrical sample of an unknown material is to be tested. The sample is 40 cm long and has a cross sectional area of 2.5 cm2. The sample is hung vertically and a 50 kg weight is attached to its free end. It is found that the sample stretches to a length of 40.1 cm. (a) What is the tensile stress on the sample? (b) What is the tensile strain? (c) What is Youngs modulus for this material? 10.2 (a) Bone has a tensile Youngs modulus of γtensile-16x 109 N m-2. If the sample of unknown material in Problem 10.1 was replaced with an identical sample of bone, what would the length increase of the bone be? (b) Bone has a compressive Youngs modulus of Ycompressive 9x 10 N m-2 If the 50 kg weight was used to compress the sample rather than stretch it, how much would the length of the sample change?

I just don't know the 10.2

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