1. The problem statement, all variables and given/known data The pulley is light and frictionless. Find the mass M1, given that M2 (6.00 kg) is moving downwards and accelerates downwards at 3.61 m/s2, that θ is 30.0°, and that μk is 0.490. 2. Relevant equations F=ma F||=mg*cos(theta) Fper=mg*sin(theta) 3. The attempt at a solution I have no idea where to start this problem.. I know how to find F|| and Fperendicular when theres no pulley/no friction.. no idea where to start..