Question 9.4:
Young’s modulus, Y = Stress / Strain
For a constant stress: Y ∝ (1 / Strain)
Hence, Young’s modulus for rubber is less than it is for steel.
(b) True
Shear modulus is the ratio of the applied stress to the change in the shape of a body. The stretching of a coil changes its shape. Hence, shear modulus of elasticity is involved in this process.
Read
the following two statements below carefully and state, with reasons,
if it is true or false.
(a) The Young’s modulus of rubber is greater than that of steel;
(b) The stretching of a coil is determined by its shear modulus.
(a) The Young’s modulus of rubber is greater than that of steel;
(b) The stretching of a coil is determined by its shear modulus.
Solution:
(a) FalseYoung’s modulus, Y = Stress / Strain
For a constant stress: Y ∝ (1 / Strain)
Hence, Young’s modulus for rubber is less than it is for steel.
(b) True
Shear modulus is the ratio of the applied stress to the change in the shape of a body. The stretching of a coil changes its shape. Hence, shear modulus of elasticity is involved in this process.
No comments:
Post a Comment