43 H A block of mass m1 = 250 g is at rest on a plane that makes an angle of 6 = 30 with the horizontal. The coefcient of kinetic friction between the block and the plane is 0.100. The block is attached to a second block of mass m2 = 200 g that hangs freely by a string that passes over a frictionless, massless pulley (Figure 5-62). When the second block has fallen 30.0 cm, what will be its speed? m