1. The problem statement, all variables and given/known data Three forces, given by 1 = ( -2.35 i - 2.10 j ) N, 2 = ( 4.90 i + 3.05 j ) N, and 3 = (49.0 j ) N, act on an object to give it an acceleration of magnitude 3.65 m/s2. (a) What is the direction of the acceleration? 86.1° (from the positive x axis) (b) What is the mass of the object? _____kg (c) If the object is initially at rest, what is its speed after 10.0 s? _____m/s (d) What are the velocity components of the object after 10.0 s? (____ i + ____ j) m/s 2. Relevant equations F = ma Vf = Vi + at 3. The attempt at a solution F = ma m = F/a To find mass (kg), I divided 2.55 by 3.65 and got 0.7 kg as the answer. That should be the correct answer but it isn't. Can someone please tell me what I did wrong? Thanks.