Mechanics - Springs and pulleys

  • #1
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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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Answers and Replies

  • #2
Doc Al
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Hint: What's the tension in the spring connected to the 4kg block?
 
  • #3
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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 cant find the extension
 
  • #4
Doc Al
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Start by analyzing the forces on the 6 kg block.
 
  • #5
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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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  • #6
Doc Al
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And just one more question ,,, (just out of curiosity) ... what does AL means in Doc Al
It's my name. Clever, eh? :wink:
 
  • #7
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It's my name. Clever, eh? :wink:
:bugeye:
And congrats ... you're gonna reach 30,000 posts soon ... i guess maximum till now
 

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