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## Homework Statement

For a system (with frictionless pulley) Mewsubk = .25 and the system is initially at rest. The mass of block 1 is 16 kg and the mass of block 2 is 12 kg. Determine the minimum coefficient of static friction needed to prevent any movement.

## Homework Equations

F=ma

## The Attempt at a Solution

I have no idea how to figure it out.

I figured out the acceleration to be 2.8m/s^2 because:

a= 12kg*9.8m/s^2 - .25*16kg*9.8m/s^2/(16kg+12kg)

I figured out the tension in the connecting string to be 84 N because:

T=mewsubk*m1g+m1a

Any help on how to figure out minimum coefficient of static friction?