1. The problem statement, all variables and given/known data A 3.72 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 11.5 N at an angle θ = 20.5° above the horizontal. The coefficient of kinetic friction between the block and the floor is 0.070. What is the speed of the block 6.10 s after it starts moving? 2. Relevant equations F=ma vf = at 3. The attempt at a solution What is the normal force in this case, because it's not mg, as I tried that and got it wrong.