Complex mechanics/dynamics problem

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The discussion revolves around a complex mechanics and dynamics problem involving the equations Aa = Ab + Aa/b and Va = Vb + Va/b, along with vector notation that includes terms like ω' x r and Arel. The user expresses confusion regarding the variable nature of distance r1 and its implications on motion, questioning how changes in r affect other variables. The need for clarification on the positions of points a and b is also highlighted, indicating a lack of understanding of the problem's spatial relationships.

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So this is the problem. Relevant equations should be:

Aa = Ab + Aa/b
Va = Vb + Va/b

and vector notation:

Aa = Ab + ω' x r + ω x (ω x r) + 2ω x Vrel + Arel

I have no attempt at this because I am currently working on it and really have no idea if I am going in the right direction.

Can anybody help?

Homework Statement


Homework Equations


The Attempt at a Solution

 
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Is the distance r1 variable? I presume that the distance r is considered as a driving motion, but how does changing r cause anything else to change? It looks like r could change without requiring motion anywhere else. Something is quite unclear about this mechanism.

Where are a and b? (the lower case letter points)?
 

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