1) If the velocity of a particcle is zero, can its acceleration be zero? Explain. 2) Consider the floowing combinations of signs and values for velocity and accleration of a particle with respect to a one-dimensional x axis. Velocity | Acceleration + | + + | - + | 0 - | + - | - - | 0 0 | + 0 | - Describe what a particle is doing in each case, and give a real-life example for an automobile on an east-west one dimensional axis, with east considered the positive direction. I do not understand this at all! Please please please please help if you can with as much as you can. ANY help will be greatly appreciated because I have no idea what to do.