Science 10 April 17 in-class Practice (id: 52b67fec5)

[问答题]
Can the velocity of an o4 kuqo86g 5zh fsv4eb+bject be negative when its acceoxjy.3ddp -.- gl+ jfxy2v o5bl- eration is positive? What abou.vf- djd2xlo 3-pj.oygb+xy5 t vice versa? If yes, give examples in each case.

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