1. The problem statement, all variables and given/known data A 12 kg box is pushed along a horizontal surface by a 24N force at 40 degrees. The frictional force (kinetic) acting on the object is 6 N. What is the acceleration of the object? 2. Relevant equations Ff= uFn Fn= Fg + Ft ?? 3. The attempt at a solution My Fn = 136 N Ff = 16.3 N ma= 24cos40 - uFn --- I had this question on a test and I don't know how to solve it!!