【文档说明】内蒙古包头市2020-2021学年高一上学期期末考试物理答案.pdf,共(3)页,132.364 KB,由小赞的店铺上传
转载请保留链接:https://www.doc5u.com/view-5fac7b84c5245b9ac34360d4e2a3a066.html
以下为本文档部分文字说明:
01mkgkF0gtvv0s3103000gvvtm453)10(213302122110gttvx222021attvx21213045a2m/s30amamgFN403010mamgF21
2tt包头市2020-2021学年第一学期期末高中教学质量检测考试高一物理试题参考答案一、选择题题号123456789101112答案DBBCDCAAABDBCACBC二、实验题13.(1)电火花(1分)(2)
0.050(2分);0.050(3分)14.(1)2.00(3分)(2)(3分)(3分)三、计算题15(9分)A小球做竖直上抛运动.........................2分.........2分..........................
............1分...................................2分.................................1分..................1分21m/s5.0278)sin(cosmFmgFmFa合m
/s245.0202120cxavv22m/s1-21210sinmmgFmFa合2m220222c2avvx1.2m6.02sinxh212m/s24.0104.0242.0MMgFa2121amFmg
Fa>16(12分)(1)物块在水平面做匀加速直线运动在斜面上做匀减速直线运动..........3分...........2分(2)继续沿斜面向上运动过程中滑块做匀减速直线运动..............
3分.............................3分.....................1分17(16分)(1)木板要向上运动对木板应有f>Mg=4N....................
.........................1分滑块与木板间的滑动摩擦力4N202.01Ff...............................2分∴当F1≤20N时候f≤4N无论F2多大木板都不会发生滑动
....................................................1分(2).............2分.............................1分14.4N240.2100.820.8112
>FmgmaF212m/s54.0104.0302.0MMgFa21217.5m/s0.8300.2-8-20mFmgFa21121tax22221taxm5.021xxs510t....2分所以F2>14.4N(3)...
..........1分..........1分.......................................1分.......................................1分........................
..........1分解得.......................................2分