A dog running in an open field has components of velocity vx = 2.4 m/s and vy = -1.5 m/s at time t1 = 11.8 s . For the time interval from t1 = 11.8 s to t2 = 22.1 s , the average acceleration of the dog has magnitude 0.47 m/s2 and direction 25.5 ∘ measured from the x−axis toward the y−axis