When will the tension the same throughout a rope?

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SUMMARY

The discussion centers on the concept of tension in a rope, specifically addressing a homework question (Q7) regarding uniform tension. It is established that if the rope is massless and frictionless, the tension remains constant throughout the rope. Conversely, if the rope has mass or experiences friction, the tension varies along its length, as indicated by the tension values T(x+dx) and T(x). This distinction is crucial for understanding the mechanics of tension in different scenarios.

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Homework Statement


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Homework Equations

The Attempt at a Solution


I have the solution of the questions and I don't understand why the tension in Q7 is assumed to be uniform throughout the rope, however the tension in Q7 is not the same throughout the rope (i.e. for a segment dl, the tension in each side is T(x+dx) and T(x) respectively.)
Thank you for your help.
 

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Clara Chung said:
why the tension in Q7 is assumed to be uniform throughout the rope
If the string is massless and there is no friction then the tension must be constant. If not, the string segment would shift in the direction of the greater tension.
 
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