How Does Mass Influence Angular Acceleration?

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Homework Help Overview

The discussion revolves around the relationship between mass and angular acceleration, specifically how mass influences angular motion in a physical context. Participants are addressing a problem related to torque and its connection to angular acceleration.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants express confusion about the role of mass in angular acceleration and discuss relevant equations, including the relationship between torque and angular acceleration. There is an exploration of how to organize equations effectively.

Discussion Status

Some participants have identified relevant equations and are seeking confirmation of their understanding. There is a productive exchange regarding the equations of motion related to torque and moment of inertia, with some guidance being offered on the correct relationships.

Contextual Notes

Participants are working with specific equations related to torque and moment of inertia, indicating a focus on the mathematical relationships in the problem. There is an acknowledgment of the need for clarity in organizing their approach to the problem.

apaxapax
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Homework Statement



See attached

Homework Equations



Ok..Im having difficulty with this problem. I don't see what m has to do with angular accerleration.

The Attempt at a Solution


I believe the equation to use for this is a=rα ? I just can't get there..any help would be great

thanks




Homework Equations





The Attempt at a Solution

 

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apaxapax said:

Homework Statement



See attached

Homework Equations



Ok..Im having difficulty with this problem. I don't see what m has to do with angular accerleration.

The Attempt at a Solution


I believe the equation to use for this is a=rα ? I just can't get there..any help would be great

thanks

Well the tension would exert a torque, so what equation relates torque and angular acceleration?
 
ok..found an equation...guess I need to organize equations better..seems to be my big problems.
t=mr2α

that should do it I think..anyone like to confirm?

thanks
 
apaxapax said:
t=mr2α

that should do it I think..anyone like to confirm?
Almost. The general equation that you need, as rock.freak was leading you towards, is:
Torque = I*alpha

What's I for a uniform disk?
 
I = 1/2mr2
 
apaxapax said:
I = 1/2mr2
Good!
 
thanks for the help. much appreciated
 

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