The image above represents normal stress.

To calculate for normal stress, two essential parameters are needed and these parameters are **normal force (ΔN)** and **area (ΔA).**

The formula for calculating the normal stress:

σ_{n} = ^{ΔN} / _{ΔA}

Where;

σ_{n} = Normal Stress

ΔN = Normal Force

ΔA = Area

Let’s solve an example;

Calculate the normal stress with a normal force of 12 and an area of 22.

This implies that;

ΔN = Normal Force = 12

ΔA = Area = 22

σ_{n} = ^{ΔN} / _{ΔA}

σ_{n} = ^{12} / _{22}

σ_{n} = 0.54

Therefore, the **normal stress** is **0.54 Pa.**

**Calculating the Normal Force when the Normal Stress and Area is Given.**

ΔN = σ_{n} x ΔA

Where;

ΔN = Normal Force

σ_{n} = Normal Stress

ΔA = Area

Let’s solve an example;

Calculate the normal force when the normal stress is 25 with an area of 10.

This implies that;

σ_{n} = Normal Stress = 25

ΔA = Area = 10

ΔN = σ_{n} x ΔA

ΔN = 25 x 10

ΔN = 250

Therefore, the **normal force** is **250.**

Continue reading How to Calculate and Solve for Normal Stress | Rock Mechanics