Determining the total distance a solid sphere will roll.

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Discussion Overview

The discussion centers on calculating the total distance a solid sphere, modeled as a marble, will roll along a flat cardboard surface. Participants explore the effects of rolling resistance and friction on the marble's motion, considering assumptions about non-deformability and slipping.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks to determine the distance traveled by a marble propelled by an external force, noting the need for the coefficient of rolling resistance to calculate the total distance.
  • Another participant suggests measuring rolling resistance based on experimental data, as estimating it without data is not feasible.
  • One participant questions the existence of resistance if both the marble and the surface do not deform.
  • A participant asserts that the marble will stop due to rolling friction, which they believe must be determined experimentally.

Areas of Agreement / Disagreement

Participants express differing views on the role of rolling resistance and the necessity of experimental data to determine it. There is no consensus on how to approach the calculation of the total distance the marble will roll.

Contextual Notes

Participants acknowledge limitations in estimating rolling resistance without specific data and highlight the dependence on experimental measurements for accurate calculations.

smalveh
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Hi guys not sure if this belongs in the homework section, anyway here goes!
I'm trying to calculate the total distance a marble (I'm modeling it as non-deformable solid sphere) will travel along a flat cardboard surface (I'm also assuming the cardboard does not deform).
The sphere will initially be propelled by a known external force, it can be assumed that the sphere will not slip.
I've tried figuring this out by calculating the rolling resistance that acts on the marble as it moves across the surface, but it seems that this is not possible without knowing the coefficient of rolling resistance between the marble and the cardboard surface.
I'm quite sure I could figure out the total distance if I knew the magnitude of the friction acting on the sphere because I also know the speed at which the marble is launched.
I know the coefficient of static friction between the two surfaces as well if that helps in any way.

Any way thanks for your help.
 
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I don't see any method to estimate the rolling resistance without any data except the static friction. Measure it, and calculate it based on the measurements?
 
If the marble and surface don't deform, how will there be any resistance?
 
The marble will stop only because of rolling friction and that, I believe, has to be calculated experimentally
 
ashishsinghal said:
The marble will stop only because of rolling friction and that, I believe, has to be calculated experimentally

I thought this would end up being the case ashishsinghal.
Thanks for your help anyway guys.
 

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