1. The problem statement, all variables and given/known data Find the acceleration in the system of a fletcher’s trolley given m1 = 1.0 kg and m2 = 9.0 kg and a 50 N force of friction exists. θ = 33° See the image below, to explain the diagram. This one has an angle of 33 degrees that is why it is hard. http://i39.tinypic.com/3497zo9.png 2. Relevant equations I am not sure. 3. The attempt at a solution Okay so first I found out the horizontal component of m1 by the formula cos(33)*mass(which is 1.0kg) and got the value 0.838 , then I put the formula Fnet=[(M2*A)-Ff]/(m1+m2) which means 9.0kg*9.81m/s2 - 50 N divided by (0.838+9) .. the answer was 3.9 M/s2 but this is the wrong answer, i asked my teacher, he said you are somewhere close but this is not right. I cannot figure this out, I have been trying different things since hours.