8.陕西省榆林市绥德县绥德中学高三年级物理学科高考模拟试卷
陕西省榆林市绥德县绥德中学高三年级物理学科高考模拟试卷第I卷(选择题,共48分)一.选择题:本题共12小题,每小题4分。在每小题给出的四个选项中,第1-8题只有一项符合题目要求,第9-12题有多项符合题目要求。全部选对的得4分,选对但不全的得2分,有选错的得0分。1.如图所示,一个质点做匀加速直线运动,依次经过a,b,c,d四点,已知经过ab,bc和cd三段所用时间之比为3:2:1,通过ab和cd段的位移分别为x1和x2,则bc段的位移为( )A.B.C.D.【答案】B【解析】设质点经过ab,bc和cd三段所用时间分别为,和,设各段时间内的位移分别为:和,由题可得,…①设bc段的位移为x,则...
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