题干

图示是一汽车在行驶过程中通过交叉路口的速度一时间图象.由图象可知(   )

A:汽车在路口等候的时间为14 s

B:汽车减速阶段的加速度大小为2.5 m/s2

C:汽车减速阶段通过的路程为20 m

D:汽车在启动过程做加速度增大的加速运动

上一题 下一题 0.0难度 选择题 更新时间:2018-05-04 09:50:52

答案(点此获取答案解析)

B,C

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