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## Homework Statement

[PLAIN]http://img693.imageshack.us/img693/8219/utennavnu.png

## Homework Equations

n= normal force

µ*n=friction

F=ma.

T = tension , mA = mass of A, mB mass of B

## The Attempt at a Solution

a) Static friction should be used. Forces on brick A : x: T - µ*mg=0 y dir: n-mg=0

B: x: (mA+MB)g*µ , tension and friction between A and B, y: mg=n , force from A.

b) Kinetic friction is to be used, have tried to find an expression of the acceleration , but so far hasnt come to the right answer.

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