Torque and tangential velocity

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Discussion Overview

The discussion revolves around the concepts of torque, moment of inertia, and their relationships to angular and tangential velocity. Participants explore theoretical aspects, definitions, and the implications of these concepts in physics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant inquires about the relationship between moment of inertia and torque, suggesting a need for clarification on these concepts.
  • Another participant presents the equation relating force to torque, indicating a parallel between linear and rotational dynamics.
  • A request for the definition of moment of inertia is made, highlighting a gap in understanding.
  • One participant suggests looking up definitions online, mentioning the relevance of moment of inertia in structural strength.
  • A question is posed regarding why torque causes changes in tangential and angular velocity, indicating a desire for deeper understanding beyond equations.
  • Another participant emphasizes that fragmented questioning may hinder learning, advocating for structured learning approaches.
  • Torque is described as a twisting force that imparts angular velocity to an object, suggesting a basic understanding of its effect.
  • It is noted that mass contributes to inertia in linear motion, while moment of inertia serves a similar role in rotational motion, with dependence on mass distribution relative to the axis of rotation.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and inquiry regarding the concepts, with no consensus reached on the explanations or the best approaches to learning these topics.

Contextual Notes

Some participants express uncertainty about the underlying reasons for the relationships between torque, moment of inertia, and angular acceleration, indicating potential gaps in foundational knowledge.

Josielle Abdilla
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Poster has been reminded to show more effort and reading before posting basic questions like this.
What is the moment of inertia and what relationship does it have to do with the torque. I have advanced physics
 
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Force = Mass times Acceleration
goes to
Torque = MI times Angular Acceleration
 
thanks a lot! Can you please give the definition of moment of inertia?
 
I think it would be less trouble for you to look that up on Wiki than for me to write it down, aamof. You do have "advanced physics" , after all. :wink:
Actually, there is a use for Moment of Inertia in the strength of structures, too - but one thing at a time, perhaps.
 
Hi..Does anyone know why torque is responsible for a change in the tangential velocity and thus the angular velocity i.e. there is angular acceleration. I know that there is an equation to prove this but I don't know why exactly Besides that, why does the moment of inertia offer opposition to the torque? Thanks to all of you who are willing to help me
 
Josielle Abdilla said:
Thanks to all of you who are willing to help me

I think the best help is to point out that asking random questions like that is a poor learning strategy. It gives you fragmented knowledge. Soon you'll find that you're missing another fragment and another.

That is why courses start with textbooks and lectures, rather than just putting the teacher up front to answer questions. You can also learn much from the universally available Wikipedia or online video courses.
 
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Josielle Abdilla said:
Hi..Does anyone know why torque is responsible for a change in the tangential velocity and thus the angular velocity i.e. there is angular acceleration. I know that there is an equation to prove this but I don't know why exactly Besides that, why does the moment of inertia offer opposition to the torque? Thanks to all of you who are willing to help me

Torque is defined as twisting force. So, the object that it is acting on will turn/twist which gives said object an angular velocity.
 
The Mass of an object is what gives it inertia (reluctance to change linear velocity).

The Moment of Inertia can be thought of as doing the same thing for rotation (eg reluctance to change angular velocity). The MOI depends on an objects mass and the arrangement of that mass in relation to the axis of rotation. The arrangement of the mass is important because the further it is from the axis of rotation the greater is the tangential acceleration in response to a constant angular acceleration.
 

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