Torques on a Rod - Need Quick Help

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    Rod Torques
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Homework Help Overview

The discussion revolves around analyzing the torques acting on a rod, focusing on the equilibrium of forces and moments in both horizontal and vertical directions.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore the possibility of the vertical and horizontal components of force summing to zero, while questioning the moments about the center of the rod. They discuss the implications of translational equilibrium and the effects of forces acting on the rod.

Discussion Status

Some participants have offered insights into the conditions of equilibrium and the nature of torques, while others are still questioning the assumptions regarding the forces and moments acting on the rod. There is an ongoing exploration of different interpretations of the problem.

Contextual Notes

There appears to be uncertainty regarding the diagram's accuracy, which may affect the assumptions about equilibrium in both axes.

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2labtqs.png



If anyone can give me some quick help on this, I would appreciate it.

Thanks in advance.
 
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physicsguy101 said:
2labtqs.png
If anyone can give me some quick help on this, I would appreciate it.

Thanks in advance.

I can't quite tell, but it looks like it's possible that the vertical and horizontal components of force could each sum to zero. But what about the moments? Try computing the sum of the moments about the center of the rod. Is it zero?

BBB
 
Well, looking at the horizontal axis only we can assume from the picture that the rod is in translational equilibrium (it doesn't move) along the horizontal axis. But looking in the vertical axis, we see a greater force downwards than the vertical component of F(3), so the rod is actually moving downwards (it's not in vertical translational equilibrium). Even if we assume that the rod is in translational equilibrium both in horizontal and vertical axes due to diagram error, if you call your pivot point the point where F(2) is acting upon, the only torque applied is a counterclockwise torque by the vertical component of F(3), which is perpendicular to a radius extending from the rod = actual torque.

I hope that helps!
 
Thanks guys! I appreciate the help!
 

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