本题目来源于试卷: Physics Bowl by Topic 2: Kinematics - part I General Motion,类别为 美国物理杯赛(Physics Bowl)
[单选题]
97.20: This question refe 3vf fpaq:hldm j:/x qfp9:;c,rs to t qawsz9s.yuvk 1 )oeer*( r (5xhe motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in th ewe( o1 z arx(9sqy*kur5)vs. e x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?
A. 0-10 s
B. 10-20 s
C. 20-25 s
D. 25-30 s
E. 30-35 s
参考答案: D
本题详细解析:
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