A force Facts on a rectangular block of mass m, at an angle of 0 as the diagram below shows. The block has a length / and a width w. a. If the block slides with constant speed, find the coefficient of kinetic friction and the position of the resultant normal force. Both answers should be based on the variables given in the problem and diagram. Hint: if the block were to rotate, what point of the block would it rotate about? b. Find the value of h for which the block just begins to tip. This part can't be done without first doing part a. W Al's Cabinets FIGURE P12.47