A 20kg cardboard box is being pushed across the floor with an applied horizontal force of 200 N. The coefficient of kinetic friction between the box and floor is 0.25. Ignore air resistance, but not friction with the ground. How much force is the friction applying? (in Newtons) What is the acceleration of the box (in m/s^2)? How fast will the box be moving after being pushed across flat ground for a distance of 12m (in m/s)?