Force of Friction Change with Increasing Mass m?

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Discussion Overview

The discussion revolves around the relationship between the force of friction and the mass of an object hanging in a pulley system. Participants explore whether increasing the mass affects the frictional force acting on a puck connected to the system, with a focus on theoretical implications rather than practical applications.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant suggests that the force of friction would not change because the string and pulley are massless.
  • Another participant questions the context of the inquiry, implying it resembles a homework question and asks for clarification on the research context.
  • A participant requests a visual representation to better understand the scenario.
  • There is a suggestion that the force of friction being discussed pertains specifically to the puck, prompting a question about how to calculate that force.
  • One participant speculates about the effects of altering gravitational force on friction, particularly in the context of static friction and its dependence on the normal force.

Areas of Agreement / Disagreement

Participants express differing views on whether the force of friction changes with increasing mass, with no consensus reached. Some participants provide speculative insights while others challenge the framing of the question.

Contextual Notes

There are unresolved assumptions regarding the nature of the frictional force and its dependence on the normal force, as well as the implications of massless components in the system.

tnutty
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Imagine a pulley system, where a puck is connected by a massless string to a massless pulley that joins a mass m that's hanging at the end of the table.

Would the force of friction change as you increase mass m , the object that's hanging? why so?

This is not a HW question.
 
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no, because the string and pulley are massless?
 
tnutty said:
Imagine a pulley system, where a puck is connected by a massless string to a massless pulley that joins a mass m that's hanging at the end of the table.

Would the force of friction change as you increase mass m , the object that's hanging? why so?

This is not a HW question.

Pretty weird general interest question. Sure sounds like homework/coursework.

What is the research/work context of your question?
 
please draw a picture
 
tnutty said:
Would the force of friction change as you increase mass m , the object that's hanging? why so?
I assume you mean the force of friction on the puck. How would you calculate that force?
 
tnutty, I think what you're asking is, if I could somehow "dial down" gravity (with a possibly elaborate system of pulleys and counterweights), would friction decrease?

Well, you tell me. In the case of static friction, which is what you appear to have described, does the fricative force depend on the Normal force? Or is is just whatever value is needed to oppose motion?
 

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