coefficient of kinetic friction, URGENT need today The system shown in the figure below has an acceleration of magnitude 0.51 m/s2, where m1 = 4.30 kg and m2 = 6.00 kg. Assume that the coefficient of kinetic friction between block and incline is the same for both inclines. Link to figure: http://img9.imageshack.us/img9/3437/figureyh.jpg [Broken] m1 is box on the left, m2 is box on the right. both angles are 35 degrees. a) find the coefficient of kinetic friction Here's what I tried: coefficient of kinetic friction = (gsinΘ - a) / gcos Θ and got .63668 when i input my answer in the system said "your answer differs from the correct answer by orders of magnitude." b) find the tension in the string T= m1a + m1gsinΘ = 26.36 N system said "your answer differs by 10% of correct answer..." Please help. I need this by tonight. Thank you!!!