Question

define stress and strain

Answer 1

Stress-

When a load is applied on a body it deforms before deformation a internal force opposes the deformation that force per unit area is called stress

Strain-

When a load applied on a body it deforms

That deformation/ change in length per original length is called strain

Answer 2

the force acting on unit area of a surface is called stress .A comparison of a changed shape of a body due to stress with original shape is called strain