Rotating & Moving Spheres: What Causes Torque & Force?

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Discussion Overview

The discussion revolves around the mechanics of rotating and moving spheres, specifically focusing on the causes of torque and net force when a central force acts on the sphere. It explores the role of friction in these scenarios and how it affects motion and rotation.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that a central force acting on a sphere causes it to both rotate and move, raising questions about what provides torque in this scenario.
  • Another participant asserts that friction is responsible for the observed motion, stating that the phenomenon would not occur on a frictionless surface.
  • A follow-up question is posed regarding the differences in the direction of friction in the two cases discussed.
  • A link to a related thread is provided for further exploration of the topic.

Areas of Agreement / Disagreement

There is some agreement that friction plays a role in the motion of the sphere, but the discussion remains unresolved regarding the specifics of how torque and net force are influenced by friction in different scenarios.

Contextual Notes

The discussion does not clarify the assumptions regarding the conditions of the surfaces involved or the definitions of torque and net force, leaving some aspects unresolved.

akshay86
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if a central force acts on a sphere it will rotate and move and also a angular momentum is given to that body it will also move in the same manner.What provide torque in first case and net force in second case.is it friction then how?
 
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akshay86 said:
is it friction then how?
Yes it is friction. It wouldn't happen on a frictionless surface.
 
A.T. said:
Yes it is friction. It wouldn't happen on a frictionless surface.
what is the diffrences in the both cases(direction of friction)?
 

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