Solving a Simple Problem with F = (mg) / 2(ìCosá - Siná) | Kai Solutions

  • Context: Undergrad 
  • Thread starter Thread starter Rodrigue
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Discussion Overview

The discussion revolves around a problem involving forces in a physical system, specifically related to a prism and the application of static friction and angles. Participants are exploring the calculations and concepts involved in determining the forces acting on the system.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Homework-related

Main Points Raised

  • Rodrigue presents a formula for force, F = (mg) / 2(ìCosá - Siná), and claims to have confirmed its correctness for the second part of the problem.
  • Rodrigue expresses uncertainty about the first part of the problem, suggesting it may be easier but is seeking assistance.
  • Rodrigue proposes that the angle á could be related to the coefficient of static friction ì by the equation á = Tan(ì).
  • Another participant questions the direction of gravity in the context of the problem, suggesting that the crane cannot support a weight through downward forces.

Areas of Agreement / Disagreement

Participants do not appear to reach consensus, as there are differing views on the relationships between the variables and the implications of gravity in the scenario.

Contextual Notes

The discussion includes unresolved assumptions regarding the direction of forces and the definitions of the variables involved, which may affect the interpretations of the problem.

Rodrigue
Hi

I have a simple and quick problem, located at: http://www20.brinkster.com/kaisolutions/prism.htm

I have calculated the second part which has been confirmed as correct: F = (mg) / 2(ìCosá - Siná)

But I am not sure how to do the first part which i suppose is easier! Thanks in advance,

Rodgrigue
 
Last edited by a moderator:
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Sorry the symbols didnt display correctly:

ì = Coefficient of static friction
á = Angle at the top of the prism

Thanks,

Rodrigue
 
Maybe this is not as easy as I thought? I thought it would be along the lines:

á = Tan(ì)

Any help is appreciated :)

Rodrigue
 
Umm. Which way is gravity? The crane will never be able to support a weight by applying downward forces...
 

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