1. The problem statement, all variables and given/known data Blocks with masses of 1kg, 4kg, and 6kg are lined up in a row on a frictionless table. All three are pushed forward by a 13N force applied to the 1kg block. a.) How much force does the 4kg block exert on the 6kg block? b.) How much force does the 4kg block exert on the 1kg block? 2. Relevant equations F=ma F=uk(n) 3. The attempt at a solution I'm not sure what's all included in the free body diagrams. I know gravitational force is pushing down on all three blocks, and I know a normal force is pushing up on all three blocks. I also know that a force is pushing on the 1kg block.