sin = opp/hyp cos = adj/hyp tan = opp/adj P=F/A sum of forces = Fret = ma Ffriction = U Fnormal Quick questions. Show your work in the space provided. 9. The force diagram to the right is for a 10 kg object. Determine its acceleration. Fbuoy ant Fdrag =10N Fr=35N Fg 10. A horizontal force of 750 N is needed to push a 250 kg crate across a level floor at constant speed. What is the coefficient of friction