im having trouble with starting this problem...
When the three blocks in the figure are released from rest, they accelerate with a magnitude of 0.600 m/s2. Block 1 has mass M, block 2 has 2M, and block 3 has 2M. What is the coefficient of kinetic friction between block 2 and the table? this question is a three mass pulley system where block one is on the far left block 2 is in the middle and block 3 is on the right side

Question

im having trouble with starting this problem...   
When the three blocks in the figure are released from rest, they accelerate with a magnitude of 0.600 m/s2. Block 1 has mass M, block 2 has 2M, and block 3 has 2M. What is the coefficient of kinetic friction between block 2 and the table? this question is a three mass pulley system where block one is on the far left block 2 is in the middle and block 3 is on the right side

mrnood · Answer

It would help if you post the figure or diagram.

anonymous · Answer

it looks just like this http://dev.physicslab.org/img/c4320f76-d447-4fb4-a7dd-8719575c091e.gif

anonymous · Answer

sorry it wont let me post a picture on here

mrnood · Answer

You can consider the block 2 in isolation. You should draw the free body diagram:

|dw:1401696208330:dw|

The vertical forces balance

The horizontal forces (to the right) are 2M - 1M - 2M*mu

The acceleration is got from F=Ma

So you know the acceleration, the "M" terms will cancel out - so you can get F hence mu