How to draw a freebody diagram of a non ideal pulley

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SUMMARY

This discussion focuses on drawing a free body diagram (FBD) of a non-ideal pulley, specifically in the context of an Atwood machine. The essential elements to include in the FBD are the two rope tensions, T1 and T2, which exert torque on the pulley. It is emphasized that each side of the rope has its own tension, and friction is assumed to be negligible for this analysis. Understanding these components is crucial for accurately representing the forces acting on the pulley.

PREREQUISITES
  • Understanding of free body diagrams (FBD)
  • Basic knowledge of torque and forces
  • Familiarity with Atwood machines
  • Concept of tension in ropes
NEXT STEPS
  • Study the principles of torque in rotational dynamics
  • Learn about the effects of friction on pulley systems
  • Explore advanced topics in mechanics related to non-ideal systems
  • Practice drawing FBDs for various mechanical systems
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Students in physics or engineering courses, particularly those studying mechanics, as well as educators looking to enhance their teaching of free body diagrams and pulley systems.

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Homework Statement


Just a quick question. I am not entirely sure how to draw an FBD of a pulley with Inertia.

Im doing a problem solving exercise for the atwood machine with two masses over a non ideal pulley and need to sketch its FBD.

Thanks
 
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The important thing to show on a FBD of the pulley are the two rope tensions acting on it, since they are the only forces creating a torque on the pulley (assuming no friction). The key is that each side of the rope will have its own tension, so call them T1 and T2.
 

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