Give an example of pure shear.

Pressure and stress have the same unit (and dimension),although they are not the same physical quantity. Why?

Under the elastic limit,the stress is:

Below are two statements. One is labeled as Assertion $(A)$ and the other as Reason $(R).$
Assertion $(A):$ The property of an object that allows it to regain its original shape after the external force applied to it is removed is called elasticity.
Reason $(R):$ The restoring force depends on the intermolecular and interatomic forces in a solid.
In the context of the above statements,choose the most appropriate answer from the options given below:

When a spiral spring is stretched by suspending a load on it,the strain produced is called

$A$ tangential force of $100 \,N$ is applied on the top face of a cubic block of side $0.1 \,m$. If the top face is displaced by $0.02 \,cm$ relative to the bottom face,what is the tangential strain?