# Force acting on steel rod (deformation)

• foo9008
In summary: For the rod to be in equilibrium, there must be a force applied by the wall at location A, which is (300 - 180) + 120 = 0N.

#### foo9008

in this problem , i could only understand that P3 = 120KN , i can't understand why P2= -60kN and why P1 = 240kN ? can someone explain ?

## The Attempt at a Solution

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In the same way that you can do a shear force diagram for lateral loads on a beam you can do a tension force diagram for axial loads on a shaft .

Basically plot a graph of axial tension against position along shaft . Have a try .

Nidum said:
In the same way that you can do a shear force diagram for lateral loads on a beam you can do a tension force diagram for axial loads on a shaft .

Basically plot a graph of axial tension against position along shaft . Have a try .
What do you mean? can you explain further?

If you do a force balance on the entire rod, what do you get for the reaction force on the left end?

Chestermiller said:
If you do a force balance on the entire rod, what do you get for the reaction force on the left end?
how to do it ? i know only the P3 ... which is 120kN , how to do for P1 and P2 ?

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foo9008 said:
how to do it ? i know only the P3 ... which is 120kN , how to do for P1 and P2 ?
You have 3 forces acting on the rod: 300 kN, 180 kN, and 120 kN. In order of the rod to be in static equilibrium, there must also be a force applied by the wall on the bar at location A. What does that force have to be?

Chestermiller said:
You have 3 forces acting on the rod: 300 kN, 180 kN, and 120 kN. In order of the rod to be in static equilibrium, there must also be a force applied by the wall on the bar at location A. What does that force have to be?
what i found is this ? how to find the force applied by the wall on the bar at location A. ??
btw , i am not sure which 1 is P3 and which one is P2

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foo9008 said:
what i found is this ? how to find the force applied by the wall on the bar at location A. ??
btw , i am not sure which 1 is P3 and which one is P2
Forget about P1, P2, and P3 for now. Are you saying that you don't know how to do a 1 dimensional equilibrium force balance on a solid object?

foo9008
Chestermiller said:
Forget about P1, P2, and P3 for now. Are you saying that you don't know how to do a 1 dimensional equilibrium force balance on a solid object?
yes

F = 300 -180 + 120

foo9008

## 1. What is force acting on a steel rod?

The force acting on a steel rod is the external force applied to the rod, which causes it to deform or change shape.

## 2. How does the force affect the deformation of a steel rod?

The force applied to a steel rod can cause it to elongate, compress, or bend depending on the direction and magnitude of the force.

## 3. What factors influence the force acting on a steel rod?

The force acting on a steel rod is influenced by several factors including the material properties of the rod, the type and direction of force applied, and the temperature of the rod.

## 4. How is the force acting on a steel rod measured?

The force acting on a steel rod can be measured using a force gauge or load cell, which can accurately measure the amount of force applied to the rod.

## 5. What are the consequences of excessive force acting on a steel rod?

Excessive force acting on a steel rod can lead to permanent deformation, failure or breakage of the rod, and potential safety hazards if the rod is part of a larger structure.