A force of 35.0 N is required to start a 6.0-kg box moving across a horizontal concrete floor. Part A What is the coefficient of static friction between the box and the floor? Express your answer using two significant figures. s = SubmitGive Up Part B If the 35.0-N force continues, the box accelerates at 0.44 m/s2 . What is the coefficient of kinetic friction? Express your answer using two significant figures. k =