如图所示是警察检查车辆时常用的阻车器,其表面密布118根侧面有凹槽的铁钉。若汽车闯卡并驶上阻车器,铁钉将扎破轮胎,使它在30s内彻底没气。下列说法错误的是_刷题宝

题干

如图所示是警察检查车辆时常用的阻车器,其表面密布118根侧面有凹槽的铁钉。若汽车闯卡并驶上阻车器,铁钉将扎破轮胎,使它在30s内彻底没气。下列说法错误的是（）

A：铁钉尖头向上,能增大对车胎的压强,利于扎破轮胎

B：铁钉的侧面有凹槽 ,能在铁钉扎破轮胎时迅速放气

C：汽车闯过阻车器后,受力面积增大,从而对地面压强减小

D：汽车闯过阻车器后,因为车速减小,所以惯性也随之减小

上一题下一题 0.0难度选择题更新时间:2018-05-30 07:31:47

答案(点此获取答案解析）

D

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