When a person ice-skates, the ice surface actually melts beneath the blades, so that he or she skates on a thin film of water between the blade and the ice. (a) find an expression for total friction force f on the bottom of the blade as a function of skater velocity v, blade length l, water film thickness h, water viscosity , and blade width w. (b) suppose a skater of mass m, moving at constant speed vo, suddenly stands stiffly with skates pointed directly forward and allows herself to coast to a stop. neglecting air resistance, how far will she travel (on two blades) before she stops