block a, with a mass of 10.0 kg, rests on a 35.0° incline. the coefficient of kinetic friction is 0.300. an attached string is parallel to the incline and passes over a massless, frictionless pulley at the top. the largest mass mb , of block b, attached to the dangling end, for which a can accelerate up the incline at 1.00 m/s2, is