山西省太原市2024-2025学年高一下学期期中考试 物理含答案

一、单项选择题：本题包含7小题，每小题4分，共28分。题号1234567选项CCCBADB二、多项选择题：本题包含3小题，每小题6分，共18分。题号89选项BDBCBD三、实验题：共16分。（1）1.0（2分2）3.9（3分3）10（2分）12.（9分）（1）0.30（3分2）10（3分3）1.7（3分）四、计算题：共38分。13.（8分）设地球质量为M，月球质量为m1，苹果质量为m2，地球半径为R，则月球与地球中心距离r=60R对月球，由万有引力提供向心力··········································································（3分）对苹果，由万有引力等于重力··········································································（3分）:2（2分）14.（12分）（1）汽车在A点对桥面压力为0，重力提供向心力················································································(2分)汽车从A点做平抛运动，竖直方向·······································································(2分)水平方向·····································································(2分)····································································(1分)an=50v3m········································································(1分)（2）汽车在C点对桥面压力为0，重力沿半径方向分力提供向心力······················································(2分)(2分)15.（18分）（1）小物块P在A点时摩擦力恰好为0，此时小物块只受重力mg和陶罐对它的支持力N。将支持力N沿水平和竖直方向分解水平方向Nsin0-mufsino·····················································(2分)················································································(1分)（2）小物块有沿罐壁向上滑动的趋势，此时小物块受重力mg支持力N'和摩擦力f竖直方向N'cos0=mg+fsino··················································(2分)···············································································(1分)方向沿罐壁向下············································································(1分)3（3）当角速度最小时，小物块有沿罐壁向下滑动的趋势，摩擦力方向沿罐壁向上竖直方向N"cos0+fmussinb=mg··········································(2分)fimr=UN"··············································································