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【免费下载】精编天津市实验中学滨海学校20222023学年八年级下学期期中考试物理试题

  • 2026-02-22 15:53:13
【免费下载】精编天津市实验中学滨海学校20222023学年八年级下学期期中考试物理试题

学年天津实验中学滨海学校八年级(下)期中物理试卷

、单选题(共10小题)

1. 如图所示,在跳台滑雪比赛中,运动员在空中滑翔时所受重力示意图正确的是(  )

A. B. C. D. 

2. 下列关于运动和力的说法正确的是(

A. 在水平面上滑动的木块最终停下来,是由于没有外力维持它运动

B. 物体受到了力的作用,运动的方向一定会发生改变

C. 汽车限载是为了减少汽车的惯性

D. 踢球时,脚会痛是因为球对脚的作用力大于脚对球的作用力

3. 如图所示,将物理书放在水平桌面上,下列说法正确的是(  )

A. 书对桌面压力就是书的重力

B. 书对桌面的压力和桌面对书的支持力是一对相互作用力

C. 书对桌面的压力和桌面对书的支持力是一对平衡力

D. 如果书受到的所有的力都消失,它会掉在地上

4. 下列事例中,利用大气压作用的是(  )

A. “玉兔号”在月球上留下“足迹”B. 菜刀磨得锋利

C. 用吸管吸饮料D. 潜水时穿潜水服

5. 如图所示,放手后纸片不能保持静止,这样的操作是为了探究物体在平衡状态下所受的两个力(  )

A. 大小是否相等B. 方向是否相反

C. 是否作用在同一物体上D. 是否作用在同一直线上

6. 下列实例中,目的是为了减小摩擦的是(  )

A. 骑自行车的人刹车时用力捏闸

B自行车轴承中装有滚珠

C. 自行车轮胎上制有凹凸的花纹

D. 用橡胶制作自行车的闸皮

7. 汽车经过长途行驶后,车身往往会沾满灰尘,其主要原因是(  )

A. 车轮旋转时扬起的灰尘溅到了车身上

B. 在途中遇到了沙尘暴天气

C. 车身附近空气流速大,压强小,空气中的灰尘被压向车身

D. 车身附近空气流速小,压强大,空气中的灰尘被吹向车身

8. 如图所示,把一金属块挂在弹簧测力计下,金属块全部浸没于水中,弹簧测力计的示数为F,若要使弹簧测力计的示数变小,下列做法可行的是(

A往烧杯里加水

B. 往烧杯里加些食盐

C. 往烧杯里加些酒精

D. 把弹簧测力计向上提一下,但金属块不露出水面

9. 如图所示,沈清同学利用托里拆利实验测量大气压强的值,以下判断正确的是(  )

A. 此时大气压强等于760mm高水银柱所产生的压强

B. 若将玻璃管稍稍倾斜,则管内外水银面的高度差将不变

C. 若把此装置顶部开一个小洞,水银会向上喷出

D. 若换用密度比水银小的液体做实验,则大气压能支持液柱的高度会减小

10. 两个用同一种材料制成且完全相同的密闭圆台形容器一正一反放置在同一水平桌面上,容器内装有质量和深度均相同的液体,如图所示,若它们分别在水平方向拉力F1F2的作用下沿桌面做匀速直线运动,速度分别为v和2v,容器底部受到液体的压强分别为p1p2,下列关系正确的是(  )

A. p1=p2,F1=F2B. p1p2,F1F2C. p1p2,F1=F2D. p1p2,F1F2

二、多选题(共3小题,每小题3分)

11. 如图是某同学使用弹簧测力计测物体重力时的情景,下列说法正确的是(  )

A. 弹簧测力计对物体的拉力和物体对弹簧测力计的拉力是一对平衡力

B. 使用时弹簧测力计的弹簧伸长方向必须与所测力的方向在同一条直线上

C. 该弹簧测力计的分度值是0.2N

D. 此物体的重力是1.1N

12. 如图所示现象不能用流体压强与流速的关系来解释的是(

A. 图甲所示飞机升力产生原因

B. 图乙所示向两张纸中间吹气,纸张向中间靠拢

C. 图丙所示地铁站台边,人必须站在黄色以外的区域候车

D. 图丁所示装有液体的玻璃管,底部和侧壁的橡皮膜往外凸起

13. 某同学沿直线水平向右的力推静止在水平地面上的箱子,推力F的大小以及箱子的运动速度v随时间t的变化情况分别如图甲、乙所示,则(  )

A. 由甲图可知在46s时,箱子受到的推力为30N

B. 由乙图可知:在04s内,箱子静止

C. 610秒物体匀速直线

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  1. CONNECT:[ UseTime:0.000361s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000615s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000270s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000281s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000629s ]
  6. SELECT * FROM `set` [ RunTime:0.000244s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000523s ]
  8. SELECT * FROM `article` WHERE `id` = 469612 LIMIT 1 [ RunTime:0.004002s ]
  9. UPDATE `article` SET `lasttime` = 1771823622 WHERE `id` = 469612 [ RunTime:0.000850s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000268s ]
  11. SELECT * FROM `article` WHERE `id` < 469612 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000399s ]
  12. SELECT * FROM `article` WHERE `id` > 469612 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000429s ]
  13. SELECT * FROM `article` WHERE `id` < 469612 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004022s ]
  14. SELECT * FROM `article` WHERE `id` < 469612 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003611s ]
  15. SELECT * FROM `article` WHERE `id` < 469612 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005352s ]
0.091637s