1. The problem statement, all variables and given/known data A bob of mass m is suspended from the ceiling of a train moving with an acceleration g/√3 (a) If an observer is sitting inside the train, what angle with the vertical will he observe? (b) If an observer is standing on the platform, what angle will he observe? 2. Relevant equations 3. The attempt at a solution I know that the angle is 30 degrees (after taking the pseudo force into account), but I'm not sure if this is the answer for both parts or just (b)?