1. The problem statement, all variables and given/known data Find acceleration of block on the way down incline. The incline is 40 degrees and made of steel. The block is also made of steel. μs = 0.6 μk = 0.3 mass of block = 2.00 kg 2. Relevant equations a = g (sinθ - μcosθ) a = F/m 3. The attempt at a solution My friend is getting 4.04 somehow. When I plug the numbers in, using the coefficient of kinetic friction, I get 9.26.