Is the Problem of the Rotating Rod Solvable with Given Details?

  • Context: Undergrad 
  • Thread starter Thread starter Drew777
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Discussion Overview

The discussion revolves around the solvability of a problem involving a uniform rod in equilibrium, subjected to an upward force and its weight. Participants question the details provided in the problem and the units used for measurement.

Discussion Character

  • Debate/contested, Conceptual clarification

Main Points Raised

  • Some participants question whether the problem can be solved as presented or if additional information is needed.
  • There is confusion regarding the use of dynes as a unit of measurement for the rod, which is typically a unit of force.
  • Some participants express curiosity about how the rod can remain in equilibrium given the forces acting on it.
  • One participant draws a parallel between measuring a rod in dynes and measuring a person in pounds, suggesting a misunderstanding of units.

Areas of Agreement / Disagreement

Participants generally agree that there are issues with the problem's presentation, particularly regarding the units of measurement, but no consensus is reached on whether the problem is solvable with the given details.

Contextual Notes

There are unresolved questions about the assumptions related to the forces acting on the rod and the definitions of the units used in the problem.

Drew777
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I was wondering if this problem could be solved as it is or if there is something missing from the problem.

A uniform rod 200cm in length is in equilibrium. An upward force of 200 dynes is applied 15cm from the right edge. If the rod is 50 dynes. At what point will the rod rotate about?
 
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Drew777 said:
I was wondering if this problem could be solved as it is or if there is something missing from the problem.

A uniform rod 200cm in length is in equilibrium. An upward force of 200 dynes is applied 15cm from the right edge. If the rod is 50 dynes. At what point will the rod rotate about?

How can a rod be measured in dynes? Dynes is a unit of force.
 
DaveC426913 said:
How can a rod be measured in dynes? Dynes is a unit of force.

I guess it is taking everything into consideration and making the weight the downward force.
How can this rod stay in equilibrium is what I am wondering?
 
DaveC426913 said:
How can a rod be measured in dynes? Dynes is a unit of force.

Probably the same way you measure a person in pounds.
 

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