Finding kinetic friction coefficient for block 2M on a table

[JUniTo24]

When the three blocks are released from rest, they accelerate with a magnitude of 0.500m/s^2.Block 1 has mass M, block 2 has 2M.What is the coefficient of kinetic friction between block 2 and the table?

 

[Doc Al]

Please provide a complete statement of the problem (include a diagram, if possible), show your work, and point out where you are stuck.

 

[JUniTo24]

Please provide a complete statement of the problem (include a diagram, if possible), show your work, and point out where you are stuck.

Diagram of problem

http://i260.photobucket.com/albums/ii15/Jose243_photo/diagrama.jpg"

 

[Doc Al]

Take each mass in turn, analyze the forces on it, and apply Newton's 2nd law. You'll get three equations that you can solve together to find μ.