What Is the Difference Between Torque and Moment in Physics?

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SUMMARY

The discussion clarifies the distinction between torque and moment in physics, emphasizing that while the terms can be synonymous, torque specifically refers to rotational effects involving twisting forces. In this context, the force P generates both a bending moment about the z-axis (Mz) and a torque about the x-axis (Mx), with Mz causing bending and Mx causing twisting. This differentiation is crucial for understanding mechanical systems and their behaviors under various forces.

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  • Understanding of basic physics concepts, particularly forces and moments.
  • Familiarity with rotational dynamics and the principles of torque.
  • Knowledge of vector analysis as it applies to forces and moments.
  • Basic comprehension of mechanical systems and their components.
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Homework Statement


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Homework Equations

The Attempt at a Solution


The book says that the force P causes a torque about the x axis. Why is it not a moment about x?
Why is it specifically a torque in this case?
 

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Torque and moment are synonymous in this case.
 
princejan7 said:

Homework Statement


Attached image

Homework Equations

The Attempt at a Solution


The book says that the force P causes a torque about the x axis. Why is it not a moment about x?
Why is it specifically a torque in this case?
The terms 'torque' and 'moment' are sometimes used interchangeably, although 'torque' often is used when twisting is involved. Here, the force P causes, at the base of the post support. both a moment about the z axis, Mz, and a moment about the x axis, Mx, where Mz bends the post (a bending moment) and Mx twists the post (a torque).
 

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