An object begins to move along the y axis and its position is given by the equation y = Br2 7 4r 7 3, with y in meters and tin seconds. (Express your answers in vector form.) (a) What is the position of the object when it changes its direction? i m X (b) What is the object's velocity when it returns to its original position at t = 0? mfs X Need Help? Viewing Saved Work Revert to Last Response Submit