2018年高考物理试卷(新课标Ⅰ)(解析卷)
2018年全国统一高考物理试卷(新课标Ⅰ)参考答案与试题解析 一、选择题:本题共8小题,每小题6分,共48分.在每小题给出的四个选项中,第1~5题只有一顶符合题目要求,第6~8题有多项符合题目要求.全部选对的得6分,选对但不全的得3分,有选错的得0分.1.(6分)高铁列车在启动阶段的运动可看作初速度为零的匀加速直线运动,在启动阶段,列车的动能( )A.与它所经历的时间成正比B.与它的位移成正比C.与它的速度成正比D.与它的动量成正比【考点】64:动能.菁优网版权所有【专题】31:定性思想;43:推理法;52D:动能定理的应用专题.【分析】根据车作匀加速直线运动,结合运动学公式,动能定理,及动...
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