Conceptual Question on Rotational Mechanics

AI Thread Summary
The discussion centers on whether two systems of discrete masses connected by negligible mass rods, rotating about their midpoints, have the same velocity since they appear to rotate in unison. Participants agree that if the systems are rotating in unison, their rotational velocities must be the same. However, clarification is sought on what is meant by "velocity," specifically whether it refers to the masses or the center of mass. The conversation emphasizes the importance of defining the type of velocity being discussed in rotational mechanics. Ultimately, the consensus leans towards the idea that the systems share the same rotational velocity.
master_333
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Homework Statement


Rods of negligible mass connect discrete masses as shown in the diagram below. For each system, the masses rotate about the midpoint of each connecting rod. Furthermore the systems appear to rotate in unison as time progresses. Do the systems have the same velocity?

Homework Equations

The Attempt at a Solution


I think the answer is yes because the the question says that the systems appear to rotate in unison.

Could someone please tell me if I am correct?
 
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master_333 said:
Rods of negligible mass connect discrete masses as shown in the diagram below.
You forgot the diagram.
 
You don't need the diagram. You can do it using the question. The diagram are just two rods with masses attached to them. I'm asking if moving in unison means moving with the same velocity.
 
master_333 said:
Furthermore the systems appear to rotate in unison as time progresses.
Sounds like the rotational velocity is the same.

master_333 said:
Do the systems have the same velocity?
Velocity of what? The masses? The center of mass? (See above.)
 
Thank you, that was very helpful.
 

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