1. The problem statement, all variables and given/known data A box of books weighing 300 N is shoved across the floor of an apartment by a force of 400 N exerted downward at an angle of 35.2 degrees below the horizontal. If the coefficient of kinetic friction between the box and the floor is .570, how long does it take the box to move 4.00 M, starting from rest. 2. Relevant equations E Fx = 400 cos (35.2) - mK Fn = 300 (a) E Fy = Fn - Fmg - 400 sin (35.2) 3. The attempt at a solution 400 cos (35.2) -(.570) (300) (9.8) + 400 Sin (30) = 300 A A= -3.83 m/s2 4m = (1/2) (-3.83) (t^2) t= 1.44s This is what I have so far... I don't know if its correct!?!? Can someone help me out and check it??? Thanks!!!