help please!! the first answer was wrong

(Figure 1)Block 1, of mass m1=0.700kg, is connected over an ideal (massless and frictionless) pulley to block 2 , of mass m2, as shown. For an angle of =30.0 and a coefficient of kinetic friction between block 2 and the plane of =0.200, an acceleration of magnitude a=0.500m/s2 is observed for block 2. Find the mass of block 2,m2. Express your answer numerically in kilograms. Figure 1 of 1