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**Homework Statement**

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?