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## Homework Statement

A hanging mass M1 =1 kg is attached by a light string that runs over a frictionless pulley to a mass M2=2 kg that is initially at rest on a frictionles table .

What is the magnitude of the acceleration a of M2 ?

## Homework Equations

I used for M1 :

F

_{g1}+ T =M1a (with T tension of string)

and for M2 :

N+F

_{g2}+T=M2a

## The Attempt at a Solution

NOW I'm stuck , I can't solve it , any help ??