The problem statement, all variables and given/known data A 2.5 kg block and a 3.1 kg block slide down a 30 degree incline. The coefficient of kinetic friction between the 2.5 kg block and the slope is 0.23; between the 3.1 kg block and the slope is 0.51. Determine the (a) acceleration of the pair and (b) force the lighter block exerts on the heavier one. The attempt at a solution I need help with this problem. I started to do it and I figured that since they are together they would be accelerating together therefore I decided to treat it as one system to try to calculate acceleration. When I did this I came up with some outrageous answer. Could someone help me set this up? Can you add the to coefficients of kinetic friction together and then use that number?