Is the Angular Equation Divided by Radius in This Example?

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Homework Help Overview

The discussion revolves around an angular motion problem, specifically examining an equation related to angular acceleration and its relationship to linear acceleration through radius. Participants are trying to clarify the interpretation of a specific equation in the context of the problem presented.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are exploring the meaning of an equation that appears to divide an angular equation by radius, questioning the notation used and its implications. There is also a suggestion to compare units on both sides of the equation to identify potential issues.

Discussion Status

The discussion is ongoing, with some participants providing clarifications and others expressing confusion about the notation. There is no explicit consensus, but there are indications of productive dialogue regarding the interpretation of the equation.

Contextual Notes

Participants are working with a specific equation that involves tension force and moment of inertia, and there is a mention of potential unit discrepancies that may affect understanding.

MMCS
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attached is an example question i am working through, i would appreciate if anybody could explain to me the part in the red box.

I understand the relationship

linear acceleration = ang acceleration*radius

however, this working appears to divide the angular equation by the radius?

thanks
 

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The equation just above it:
P*r = Tf + I*α

Do you understand that one?
 
oh yes, of course, i assumed it was a subscript not a multiplication of radius (where the tansion force would be acting) been looking at it too long i think, thanks for your help milesyoung
 
No problem, whoever wrote the solution should have stuck to Rd.

Edit:
Also, if something seems off about the equation you're working with, try comparing the units of whatever quantity you have on the LHS and RHS. Something might be rotten in the state of Denmark.
 
Last edited:

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