1. The problem statement, all variables and given/known data I have to draw a free body diagram representing the motion of an object @ a given point in time. This diagram is for section 1. It's of a 1.25 kg cart with a 0.6 kg can attached to it with a pulley-system. When the can drops, the cart begins to move. In section one, when the can drops, the cart begins to accelerate forward. Acceleration = 0.196 m/s(squared) Mass of cart = 1.25 kg Mass of can = 0.6 kg 2. Relevant equations F = ma 3. The attempt at a solution The diagram is uploaded here. I just want to know if this seems to be correct? EDIT: Heres the assmuptions I made I calculated net force w/ acceleration provided = 0.196 m/s and with the total mass (1.25 kg + 0.6 kg) = 1.9 kg Net force = 0.37 N I did normal force & force of gravity on the cart, which was 12.3 N for both. The falling can was what caused the motion of the cart, so I calculated Fg = 5.9 N for the 0.6 kg can. No normal force obviously because it wasn't sitting on a surface. But the can was attached to a string, which slowed down the falling can's motion. So I had to calculate F-tension. I used this formula to calculate it; Force of Tension = 2m1m2/m1m2 x Gravity I got 4N (3.97N) as the tension force. So I assumed that the applied force would be Force of Gravity on the can MINUS the Force of Tension of the string holding the can. The applied force was 1.9 N Then I calculated force of friction. I assumed it to be the applied force minus net force Which was 1.9 N - 0.37 N For friction I got 1.5 N. Does all of this seem correct?