1. The problem statement, all variables and given/known data The question and my attempt are attached as pics 2. Relevant equations 3. The attempt at a solution I can't seem to find r¨ and θ¨. Assuming I already got r˙ and θ˙ (the answers are written after the question). The idea I tried was to get the acceleration equation in cylindrical coordinates, a=(r¨−rθ˙2)r^+(rθ¨+2θ˙r˙)θ^ and the a in intrinsic coordinates (v˙t^+v2/ρn^) in our case I assumed that t^=i and n^=j and that assumption is correct because it got the r˙ right, then I got r^ and θ^ in terms of i and j and now we have 2 equations with 2 unknown. The problem is that it gets the answer wrong, I checked my numbers a trillion time, still cant get the answer, anyone have any idea what is wrong?