A mass of 26 kg lies on a frictionless horizontal floor. A force F, of unknown magnitude, is applied to the mass at an angle of 29.2 degrees above the positive x axis and a force, F2, of 54 Newtons is applied to the mass at an angle of 51.6 degrees below the negative x direction. If magnitude of F1 is increased until the object just starts to leave the surface,, what is the magnitude of the acceleration on the mass in m/s^2 at this point?