1. The problem statement, all variables and given/known data 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 ? 2. Relevant equations I used for M1 : Fg1 + T =M1a (with T tension of string) and for M2 : N+Fg2+T=M2a 3. The attempt at a solution NOW I'm stuck , I can't solve it , any help ??