Is rotational Work the same as linear Work?

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    Linear Rotational Work
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Discussion Overview

The discussion revolves around the relationship between linear work and rotational work, specifically whether they can be equated in certain contexts. Participants explore the implications of this relationship in the context of energy and angular momentum, raising questions about the necessary parameters for calculations.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants propose that linear work (W = F*D) can be equated to rotational work (W = 1/2Iω²) under certain conditions.
  • Others challenge the clarity of the initial question, suggesting it is not understandable as written.
  • One participant asks if it is possible to derive angular momentum from work and force without knowing radius, speed, or mass, prompting a response that indicates these parameters are necessary.

Areas of Agreement / Disagreement

There is no consensus on the relationship between linear and rotational work, as some participants agree that they can be equated while others question the conditions under which this is valid. Additionally, the necessity of specific parameters for calculating angular momentum remains unresolved.

Contextual Notes

The discussion highlights potential limitations in understanding the conditions required for equating linear and rotational work, as well as the dependencies on specific physical parameters for calculating angular momentum.

Just_enough
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Linear work is F*D and rotation is 1/2Iω2, but if a problem as me rotational energy (Rotation worl = KE?) of a wheel and I have the linear work, can I just set Wrotation=Wlinear?
 
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Please correct the errors in your post, your question is not understandable as written.
 
marcusl said:
Please correct the errors in your post, your question is not understandable as written.
If I have Work1=F*D, can I use that answer to be equal to W2(=1/2Iω2)?
 
Linear and rotational work can be equated, yes.
 
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russ_watters said:
Linear and rotational work can be equated, yes.
Thanks. Now is it possible to find angular momentum from just work and force? no radius, speed, nor mass are given. If so, how?
 
Just_enough said:
Thanks. Now is it possible to find angular momentum from just work and force? no radius, speed, nor mass are given.
No, you need at least radius or angular speed.
 
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