Understanding Torque: The Role of Axis of Rotation in Force Calculation"

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    Torque
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Discussion Overview

The discussion centers around the concept of torque, specifically addressing why forces acting at the axis of rotation do not contribute to the torque calculation. The scope includes conceptual clarification related to the mechanics of torque and its mathematical formulation.

Discussion Character

  • Conceptual clarification

Main Points Raised

  • One participant questions why a force acting at the axis of torque is disregarded in torque calculations, seeking clarity on the reasoning behind this principle.
  • Another participant suggests that a visual representation might aid in understanding the concept better.
  • A third participant explains that torque is calculated about a chosen point on an axis, noting that when a force acts through that point, there is no perpendicular distance from the force to the point, which is essential for torque calculation.
  • A later reply indicates that the original poster has understood the explanation provided.

Areas of Agreement / Disagreement

The discussion appears to reach a resolution for the original poster, who expresses understanding, but it does not indicate whether all participants agree on the explanation provided.

Contextual Notes

There may be limitations in the original poster's understanding of torque concepts, as well as potential assumptions regarding the definitions of torque and force application points that are not fully explored.

oneplusone
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Hello,

[1]-Why is it that if you have a force acting upon an object at the point of the axis of torque,
you don't account it in the equation when solving for torque?

Sorry, not really sure how to word it, but ill give it another shot:

You have a long piece of wood on the ground, with many forces acting upon it. On one side of
the wood, you choose the axis of rotation. One of the forces acts on this point at a 42 degree angle.

When calculating the net torque on the object, why do you disregard that force which acts on the point?

Thanks. and let me know if i should try to reword.
 
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Not making the connection. Perhaps a picture would help.
 
Torque is calculated about a chosen point on an axis. When the force acts through that point, there is no perpendicular distance from the force to the point.
 
Thanks, got it now!
 

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