# What is deformation per unit length called?- Basic Mechanical Engineering

Q.  Deformation per unit length is called as ________
- Published on 01 Sep 15

a. strain
b. stress
c. modulus of elasticity
d. none of the above

#### Discussion

• po   -Posted on 20 Oct 19
good Sravanthi
• Sravanthi   -Posted on 06 Nov 15
Strain:

- The deformation per unit length is called as strain. An object undergoes deformation, when force or load is applied on it.

- It is given as: e = δl / l

Stress:

- The internal force acting per unit area is called as stress. When external forces act on a body, internal resisting forces set up in the body which has same magnitude and are opposite in direction. It is measured by N/mm2

- It is given as: σ = P / A

Modulus of elasticity: The ratio of the stress applied on a body to resulting strain within the elastic limit is called as modulus of elasticity.

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