1. The problem statement, all variables and given/known data The position of a particle moving along the y axis has a position given by y = 0.20m + (8.0m/s) t - (10 m/s2) t2. is there any time interval during which the particle is not moving? 2. Relevant equations 3. The attempt at a solution I said No but i'm not sure why exactly it is never moving.