Question

A steel bar 100 mm long is
subjected to a tensile stress sigma .If the change in length of the bar
is 1/20 mm, what will be the
value of Sigma? E for steel=2 x 105 N/mm​

Answer 1

Explanation:

A steel bar 100 mm long is

subjected to a tensile stress sigma .If the change in length of the bar

is 1/20 mm, what will be the

value of Sigma? E for steel=2 x 105 N/mm

Answer 2

A steel bar 100 mm long is subjected to a tensile stress sigma .If the change in length of the bar is 1/20 mm, 100Mpa will be the value of Sigma.

• Force is the action done by external support.
• Force mainly occurs by the push or pull factor.
• In force, the object or particle should be in a condition of suspension or motion; it is calculated by how the object is moving or how it has been done.
• It also has both volume and movement.
• The standard unit is the newton
• Velocity is the state of the direction of the object or particle.
• Velocity is the scalar portion.
• It is the speed of transition of the distance.
• The standard unit is m/s.
• Velocity has both volume and movement.
• Velocity is the motion of an object or particle.
• Velocity is also called the rate of displacement.

Relationship between the stress and strain is given by:

б= E∈

Where б is the stress, ∈ is the strain,  E is the young's modulus of elasticity.

L = 100 mm, ΔL= 0.05mm, E= 200Gpa

Strain is produced is

∈ =  ΔL/L= 0.05/ 100 = 5×10⁻⁴

stress produced is

б= E∈

= 200×10⁹×5×10⁻⁴

б= 100Mpa

Therefore, a steel bar 100 mm long is subjected to a tensile stress sigma .If the change in length of the bar is 1/20 mm, 100Mpa will be the value of Sigma.

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