1. The problem statement, all variables and given/known data A 0.17-kg cue ball rests on the pool table. It's struck by a cue stick applying force F1→ = 13Ni^+21Nj^ Determine the magnitude of the ball's acceleration. 2. Relevant equations ax = Fnet, x / m ay = Fnet, y / m a = Fnet / m 3. The attempt at a solution Components of Acceleration: ax = 13Ni^ / 0.17kg = 76.47m/s2 ay = 21Nj^ / 0.17kg = 123.53m/s2 Magnitude: Fnet = √(13Ni^)2 * (21Nj^)2 = 24.7N angle θ = tan-1 * (21N / 13N) = 58.24° above the + x-axis (fixed. see replies below) Acceleration's Magnitude: a = Fnet / m = 24.7N / 0.17kg = 145.29m/s2 or 145m/s2 rounded I feel like this should be the answer, or that I'm very close to the answer. Am I missing a step? Did I do something wrong? Am I way off?