1. The problem statement, all variables and given/known data Given: The surface is frictionless, two blocks in contact with each other move to the right across a horizontal surface. Note: one block is 2.1kg with a 58N force applied to it, and the other block is 5.7kg with a 13N force applied to it. 2. Relevant equations Determine the magnitude of the force exerted on the block with mass 2.1kg by the block with mass 5.7 kg 3. The attempt at a solution First I subtracted 58N-13N=45 to get the net force, then I divided the net force by the mass of both blocks [45N/7.8kg]=5.769m/s^2 to get acceleration. Then I multiplied the acceleration by the 2.1kg block to get 12.115N, but this was not the right answer. So thinking that I maybe did it wrong I multiplied the acceleration by the 5.7kg block (32.884N)and this was also incorrect, finally not knowing what I was doing wrong still, I subtracted 32.884-12.115 and of course this was wrong as well. I can't figure out what I'm missing here. Any help would be appreciated.