1. The problem statement, all variables and given/known data A hanging mass, M1 = 0.493 kg, is attached by a light string that runs over a friction-less pulley to a mass M2 =1.81 kg that is initially at rest on a friction-less ramp. The ramp is at angle 30.5 above horizontal. Find the magnitude and direction of the acceleration, a2, of M2. 2. Relevant equations F=ma T-mgsin(theta)=ma F(perpendicular)=M*cos(theta) F(parallel)=M*sin(theta) 3. The attempt at a solution (.493)(9.81)-(1.81)(9.81)sin(30.5) = 1.81a a = -2.306 m/s^2 But that is not the right answer. So I am lost.