A large purple slab or rock of mass m1 = 40 kg sits at rest on a frictionless ice rink. A slightly less purple block of mass m2 = 10 kg rests on top of the slab. Between block and slab, the coefficient of static friction is 0.60, and the coefficient of kinetic friction is 0.40. A horizontal force of magnitude 100 N begins to pull directly on the block, as shown