A 0.2 kg hockey puck, sliding on an outdoor rink, has a velocity of 10 m/s [forward] when it suddenly hits a rough patch of ice that is 3 m long. Assume that the coefficient of kinetic friction between the puck and the rough ice is 0.47. Calculate the magnitude of the force of kinetic friction acting on the puck. At what rate is the puck slowing down when it is on the rough patch? Calculate the puck's velocity after 3 m (the end of the rough patch).