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

[问答题]
Can the velocity of an object be negative when its accg+m yp*yf/bj5d5vd+r el- eration is positive? Wf5mry/g by +*+5ddpvj ju.nq, 1s/v3 tir;zjke lr91what about vice versa? If yes, give examples in each case. / vns11rrlz.;i,tj9 kjueq3w

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