Solve the following problems and collect 100 points for the full credit. 1. 22 points You pull a 2.5-kg box across the horizontal floor with a horizontal force of 6.0 N, and the velocity of the box increases from 0 to 1.2 m/s in 1.5 s. (a) What is the force of kinetic friction? (b) What is the coefficient of kinetic friction between the box and the floor?