1. The problem statement, all variables and given/known data A car starts from rest and moves around a circular, horizontal, level track of radius 30 m. Its speed increases at the constant rate of 0.5 m/s^2. (a) What is the magnitude of the net acceleration 15 s later? (b) What angle does the net acceleration make with the car's velocity at this time? 2. Relevant equations 3. The attempt at a solution I think I got part A. I just found the vector sum of of the centripetal accleration, V^2/R (found V by taking integral of 0.5 from 0-15s), and the given tangental accereration of 0.5. Does this sound right? As for part B I have no idea. I dont think I can use constant acceleration kinematic equations... Also- is there a difference between the angular acceleration and the net acceleration?