1. The problem statement, all variables and given/known data Hi, I have a system of forces which is showed in the following picture: http://imageshack.us/photo/my-images/197/fuerzas.JPG/ The exercise says: A force F produces an acceleration of 5 m/s^2 when it acts on a particle of mass m. Calculate the acceleration of the particle when subjected to the forces as shown in the image, for the following cases: alpha: 90, alpha: 45. As you can see, I did not give the values of both F or m. Results: The acceleration must be 7.1 m/s^2 to 90 ° and 9.2 m/s^2 to 45 °, that is, the smaller the angle the bigger the acceleration. 2. Relevant equations F= m.a 3. The attempt at a solution I think I have to use Pitagoras, using the 2 Fs as the legs and the resultant force will be the hypotenuse? Thanks.