1. The problem statement, all variables and given/known data See attachment. 2. Relevant equations 3. The attempt at a solution My only question concerns the free body diagram. In the attachment, is the F pointing to the right friction or force of the truck accelerating? Why is the line of action of N not go through the mass center? And shouldn't friction for the cabinet point toward the left since a force is pulling it right? I'm very confused about this. Any help is appreciated thanks.