Atwood Machine and the Work done

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Homework Help Overview

The discussion revolves around an Atwood machine problem involving two blocks with masses of 2 kg and 3 kg. The original poster seeks to determine the work done by gravity during the fourth second after the system is released from rest, expressing uncertainty about their calculations related to work done.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the calculation of displacement during the fourth second and the implications of differing signs for work done on each mass. There is an exploration of the net work done by gravity.

Discussion Status

The discussion includes attempts to clarify concepts related to work done and displacement. Some participants express understanding of the concepts involved, while others acknowledge mistakes in their reasoning. The conversation appears to be productive, with guidance provided on key aspects of the problem.

Contextual Notes

There is mention of a specific time interval (from t1 = 3 s to t2 = 4 s) for calculating displacement, which may indicate constraints in the problem setup. The original poster also expresses doubt about their calculations, particularly regarding the work done.

animesh27194
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The two block in an atwood machine have masses 2kg and 3kg. Find the work done by gravity during the fourth second after the system is released from rest.I have attached my attempt here..Kindly tell me where I went wrong.
I am sure that I didnt go anywhere wrong in finding the acceleration and the displacement. But, I am doubtful abt the work done part. The answer is coming out to be 67 joules. :confused:
 

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animesh27194 said:
Find the work done by gravity during the fourth second after the system is released from rest.
What's the displacement during the fourth second? (That's from t1 = 3 s to t2 = 4 s.)

Also realize that one mass moves up while the other moves down, so the work done on each will have a different sign. Presumably, you want the net work done?
 
Last edited:
ooooh! I am so sorry...! THat's a silly mistake..! :P
 
See also the comment I added to my last post.
 
THanks a lot! I understood the concept... :)
 

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