Question

Shear modulus of a perfectly rigid body is :
(a) zero
(b) unity
(c) infinity
(d) non-zero but unity

Answer 1

Answer:

(c) infinity is the correct answer.....

Explanation:

Since a perfectly rigid body won't yield any strain, irrespective of amount of stress, it's Young's modulus is infinite

Answer 2

infinite

The shear modulus is estimated by multiplying the deformation of a solid caused by applying a force along to one of its surfaces while an opposing force applies on the opposite surface and keeps it in place. Consider shear as a force that pushes against a side of a blocks, with friction acting as an opposing force. Trying to cut wires or hairs with dull scissors is another example.