# Mechanics - Springs and pulleys

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

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

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

Doc Al
Mentor
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

OH MY GOD

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

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

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Doc Al
Mentor
And just one more question ,,, (just out of curiosity) ... what does AL means in Doc Al
It's my name. Clever, eh?

It's my name. Clever, eh?

And congrats ... you're gonna reach 30,000 posts soon ... i guess maximum till now