Clock Spring Torque: Understanding Input and Output Torque in Winding Mechanics

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    Clock Spring Torque
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Discussion Overview

The discussion revolves around the relationship between input and output torque in the context of winding mechanics, specifically focusing on clock springs. Participants explore the conditions under which these torques may be considered equal and the implications of torque balance on angular acceleration.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions whether the input torque is equal to the output torque when winding a clock spring from the outside and releasing from the inside.
  • Another participant argues that the two torques must be equal, stating that if they were not, there would be a net torque causing angular acceleration, which contradicts the scenario of holding the spring steady.
  • A later reply reiterates the argument about torque balance, expressing appreciation for the reasoning behind the argument, which is described as robust against counterintuitive concerns.

Areas of Agreement / Disagreement

There appears to be a consensus among some participants that the input and output torques are equal, though the initial question about this relationship indicates that not all participants may agree on the reasoning or implications.

Contextual Notes

The discussion does not clarify the assumptions regarding the conditions of the system, such as the effects of friction or the specific mechanics of the clock spring, which may influence the torque relationship.

John_tawil
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I'm winding up a clock spring from the outside and release from the inside. Is the input torque = to the output torque?

How would i go about setting up this problem
 
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Has to be. Imagine that you are just holding the wound spring from inside and outside. If the two torques don't cancel each other out, there is a net torque on the spring. If there is net torque, it has angular acceleration. But you are holding the spring, so it's not accelerating. Therefore, the two torques are equal.
 
THank you
 
K^2 said:
Has to be. Imagine that you are just holding the wound spring from inside and outside. If the two torques don't cancel each other out, there is a net torque on the spring. If there is net torque, it has angular acceleration. But you are holding the spring, so it's not accelerating. Therefore, the two torques are equal.

I just love those Null Arguments. Bomb proof and take care of all counter intuitive worries.
 

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