Is Zero Torque on a Pivot Point Indicative of Zero Force?

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Homework Help Overview

The discussion revolves around the relationship between torque and force at a pivot point, specifically questioning whether zero torque implies zero force. The subject area includes concepts of torque, force, and their interactions in a physics lab context.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants explore the implications of zero torque and its relation to force, questioning whether a measured force at the pivot affects torque calculations. There is discussion about the conditions under which torque can be zero, including the distance from the pivot point.

Discussion Status

The conversation is ongoing, with participants raising questions about the measurements taken in the lab and how they relate to the theoretical concepts of torque and force. Some guidance has been offered regarding the conditions that lead to zero torque, but no consensus has been reached.

Contextual Notes

Participants are working within the constraints of a lab assignment that requires measuring forces at a pivot point, which may influence their understanding of torque calculations. There is an acknowledgment of potential errors in measurements affecting the sum of torques.

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Homework Statement


if the torque on a pivot point is zero does that mean the force acting on it is zero aswell?


Homework Equations


F = mg and T = F x D


The Attempt at a Solution



The sum of the torques in this lab that I'm doing isn't equaling zero... is this normal due to error?
I think it has something to do with the pivot point and the torques
 
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Sinister said:

Homework Equations


F = mg and T = F x D

T=FD, so either F=0 or D=0. Most times, the distance of the force from the pivot is 0 i.e. the force is directly on the pivot.
 
Last edited:
ok but for the lab its asking us to measure the force along the pivot point using a scale... and we got a number so how does this affect the torque?
 
Sinister said:
ok but for the lab its asking us to measure the force along the pivot point using a scale... and we got a number so how does this affect the torque?

Well right, you might get a value for the force, but if the distance from the pivot is zero, then the torque is zero.

If the distance from the force is small, you will get a small value for the torque as well.
 

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