Mechanics - Springs and pulleys

[cupid.callin]

Homework Statement

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.

 

[Doc Al]

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

 

[cupid.callin]

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

 

[Doc Al]

Start by analyzing the forces on the 6 kg block.

 

[cupid.callin]

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

 

[Doc Al]

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

It's my name. Clever, eh?

 

[cupid.callin]

It's my name. Clever, eh?

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