Drawing a FBD for a Cup Spinning on a Lazy Susan

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SUMMARY

The discussion centers on drawing a Free Body Diagram (FBD) for a cup spinning on a Lazy Susan. Participants confirm that the FBD can be accurately represented from either a side or top-down perspective. Key forces include the gravitational force acting downward and the friction force directed towards the center of the turntable. Both perspectives effectively illustrate the same forces, with the friction force depicted as an 'X' in a circle when viewed from above.

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  • Understanding of Free Body Diagrams (FBD)
  • Knowledge of basic physics concepts such as force and friction
  • Familiarity with rotational motion principles
  • Ability to interpret diagrams and forces in two dimensions
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  • Research the principles of rotational dynamics in physics
  • Learn how to construct Free Body Diagrams for various scenarios
  • Explore the effects of friction in circular motion
  • Study the differences between top-down and side perspectives in physics diagrams
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crybllrd
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Homework Statement


A cup is spinning around on a Lazy Susan...

Homework Equations


The Attempt at a Solution


My question is about the perspective. The picture on my book is like this:
___________|---0.5m---\_/
=====================


So should I draw the free body diagram from this perspective, with the weight by the Earth on the cup pointing down, or from the top down perspective where I can see the friction force?
 
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You can go either way. Show forces into the page as an X in a circle.
The friction force would be toward the center of the turntable, so would look the same in either view.
 

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