Shearing stress causes change in

$Assertion:$ Stress is the internal restoring force per unit area of a body.
$Reason:$ Rubber is more elastic than steel.

The property of a material which opposes the change in shape,volume,or length is called

The unit of stress is:

The length of a metallic wire is $\ell_{1}$ when the tension in it is $T_{1}$. It is $\ell_{2}$ when the tension is $T_{2}$. The original length of the wire will be ...... .

Identify whether the following statements are True or False:
$(a)$ If a body breaks immediately after the elastic limit,then this body is known as ......
$(b)$ An elastic body which can be stretched to cause large strains is called ......