a boy pulls a bag of baseball bats across a ball field toward the parking lot. the bag of bats has a mass of 6.80 kg, and the boy exerts a horizontal force of 24.0 n on the bag. as a result, the bag accelerates from rest to a speed of 1.12 m>s in a distance of 5.25 m. what is the coefficient of kinetic friction between the bag and the ground?