[问答题]
Can the velocity of an omq wiow(lbc/: gkup*8 41mwy* bject be negative when its accel- eratisw,*k 8; jxft/j7b)gz4kvhyq-6 h eg (dcily 7on is positive? What about vice versa? If yes, give exxb 8ih6d h, jqt4k/y-; zyewgc7v kfsjg7*l()amples in each case.