Mechanics - Springs and pulleys

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Homework Help Overview

The discussion revolves around a mechanics problem involving springs and pulleys, specifically focusing on the forces acting on a 4 kg block and its acceleration. Participants are exploring the relationships between tension in the springs and the forces involved.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are attempting to analyze the forces acting on the blocks, questioning how to find the acceleration and the extension of the springs. There are hints regarding the tension in the springs and the application of Newton's laws.

Discussion Status

The discussion is ongoing, with participants sharing their thoughts and hints. Some guidance has been offered regarding the analysis of forces, but there is no explicit consensus on the solution yet.

Contextual Notes

Participants are working within the constraints of a homework assignment, which may limit the information they can use or the methods they can apply.

cupid.callin
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Homework Statement


attachment.php?attachmentid=33530&stc=1&d=1301086828.jpg



The Attempt at a Solution



I could say that (A)(B) are correct and (C) is wrong and i know 4kg block will have acceleration but i don't know how to find it.
 

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Hint: What's the tension in the spring connected to the 4kg block?
 
Doc Al said:
Hint: What's the tension in the spring connected to the 4kg block?

Hi Doc Al
thanks for replying

I know i need to find kx to find acceleration

so initially kx = mg + T

and even if i apply Newton laws to rest of the blocks ... i can't find the extension
 
Start by analyzing the forces on the 6 kg block.
 
ok ...

let tension in upper string is T1 and string with 4kg is T2
and extension in left and right spring is x1 and x2
attachment.php?attachmentid=33532&stc=1&d=1301089030.jpg
OH MY GOD

:biggrin::biggrin::biggrin:DOC AL ... YOU ARE MY HERO ! :biggrin::biggrin::biggrin:

:blushing:

And just one more question ,,, (just out of curiosity) ... what does AL means in Doc Al
 

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cupid.callin said:
And just one more question ,,, (just out of curiosity) ... what does AL means in Doc Al
It's my name. Clever, eh? :wink:
 
Doc Al said:
It's my name. Clever, eh? :wink:
:bugeye:
And congrats ... you're going to reach 30,000 posts soon ... i guess maximum till now
 

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