FBD and what forces should I include?

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SUMMARY

The discussion centers on drawing a Free Body Diagram (FBD) for a metal rod with a string attached to a mass, which is spun around in a horizontal circle. Key forces to include in the FBD are gravitational force, centripetal force, elastic force, and tension in the rod. Participants emphasize the importance of visual representation to accurately depict these forces and their interactions. Understanding these forces is crucial for analyzing the dynamics of the system.

PREREQUISITES
  • Understanding of Free Body Diagrams (FBD)
  • Knowledge of centripetal force and its implications
  • Familiarity with gravitational force and its effects on objects
  • Basic concepts of tension and elastic forces in physics
NEXT STEPS
  • Study the principles of Free Body Diagrams in physics
  • Learn about centripetal force calculations and applications
  • Explore the effects of tension and elastic forces in dynamic systems
  • Practice drawing FBDs for various physical scenarios
USEFUL FOR

Physics students, educators, and anyone interested in understanding the forces acting on rotating systems and the application of Free Body Diagrams in mechanics.

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In the following situation, how should I draw a FBD and what forces should I include? A metal rod has a string coming out of one end. The other end of the string is attached to a small mass. The metal rod undergoes spinning action by the hand so that the string with the mass attached spins around the metal rod and is parallel to the ground. The metal rod is held in the hand perpendicular to the ground.
 
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Could you provide a drawing please...?And what is the problem asking...?

Does gravity play a role...?

Daniel.
 
Basically the situation is, you are flinging a string with a mass at one end over your head. The strings flies around in circles kind of like a helicopter. My question is, what forces should I include in the FBD. I know there is centripetal force. There should be gravity pulling down, but what counteracts this force (a normal force?)
 
Last edited:
Elastic force,centripetal force,gravity force,and tension in the rod...What other forces would be there...?

Daniel.
 
I’m just looking for forces acting on the mass at the end of the string
 
Elastic,gravity and centripetal.But it's difficult to predict which acts how,if you don't provide a drawing ...

Daniel.
 
thanks, i'll try to get a drawing
 

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