1. (20p) A hockey puck is sliding across the ice , which has a coefficient of kinetic friction of, Jk = 0.111. The puck travels with an initial velocity of vo = 8.5 m/s . The puck has a mass of 1.25-kg a. (5p) what is the force of friction, fk, slowing down the puck? b. (5p) What is the rate of acceleration of the block, a ? b. (5p) How long does it take to slide to a stop, tstop ? d. (5p) What is the distance the puck travels as it comes to a halt, Xstop ? U. = 8,5 m / S tstop 5 m/s * stop