A 5.00-kg block is placed on top of a 12.0-kg block that rests on a frictionless table. The coefficient of static friction between the two blocks is 0.600. What is the maximum horizontal force that can be applied before the 5.00-kg block begins to slip relative to the 12.0-kg block, if the force is applied to (a) the more massive block and (b) the less massive block? In this problem does the force of friction have the same magnitude in both A and B? My logic is that it is only the normal force of the small mass that cause the friction in both cases. Is this correct?