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Question
Readthe following two statements below carefully and state, with reasons,if it is true or false.
(a) TheYoung’s modulus of rubber is greater than that of steel;
(b) Thestretching of a coil is determined by its shear modulus.
Readthe following two statements below carefully and state, with reasons,if it is true or false.
(a) TheYoung’s modulus of rubber is greater than that of steel;
(b) Thestretching of a coil is determined by its shear modulus.
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Solution
Answer: (a) False(b) True
(a) For a givenstress, the strain in rubber is more than it is in steel.
Young’smodulus,
Fora constant stress: 
Hence,Young’s modulus for rubber is less than it is for steel.
(b) Shear modulus is the ratio of the applied stress to thechange in the shape of a body. The stretching of a coil changes itsshape. Hence, shear modulus of elasticity is involved in thisprocess.
Answer: (a) False(b) True
(a) For a givenstress, the strain in rubber is more than it is in steel.
Young’smodulus,
Fora constant stress:
Hence,Young’s modulus for rubber is less than it is for steel.
(b) Shear modulus is the ratio of the applied stress to thechange in the shape of a body. The stretching of a coil changes itsshape. Hence, shear modulus of elasticity is involved in thisprocess.
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