Hi. Can anybody help me with this problem, please? I don't know what to do. Problem: A 2.0-kg mass and a 3.0-kg mass are attached to a lightweight cord that passes over a frictionless pulley. The hanging masses are free to move. The coordinate systems is with positive direction up for 2.0-kg mass and negative direction down for 3.0-kg mass. Find the acceleration of the smaller mass. Is there any different equation for this? Or do i somehow change the F=ma to fit?