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 = 0.400m/s2 is observed for block 2.
Find the mass of block 2,