# Type 1. Problems on 3 moduli of elasticity.

1. A material has Young's Modulus of 2.1 105 N/mm2 and Poisson’s ratio 0.29. Calculate the Bulk modulus and modulus of rigidity..

(Ans:81.4e3,167e3)

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2.A material has Young's modulus of 1.8 105 N/mm2 and Bulk modulus 1.2105 N/mm2 .Find the Poisson’s ratio and Modulus of rigidity.

(Ans:0.25,72 103 N/mm2)

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3. For a certain material E=2K, determine the Poisson’s ratio and find E/G?

(Ans: 0.165,E/G 2.33)

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4.If Modulus of rigidity is 75.018 105 N/mm 2 and Poisson's ratio ⅓. Find E and K.

(Ans:E=20106 N/mm2 and K=199.9E6 N/mm2 )

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5. For a certain material E=2.8K. Calculate the Poisson’s ratio. Also calculate the ratio of modulus of elasticity to modulus of rigidity.

(Ans: 0.033, E/G=2.066)

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