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【免费下载】精编安徽省滁州市凤阳县官塘中学20222023学年八年级下学期4月月考物理试题

  • 2026-02-22 12:14:52
【免费下载】精编安徽省滁州市凤阳县官塘中学20222023学年八年级下学期4月月考物理试题

2023学年八年级下学期期中教学质量调研

物理(人教版)

一、填空题(每空2分,共30分)

1. 如图所示,一小球沿着光滑的固定斜面自由滑下,请在图中作出小球受到的力的示意图。

2. 为了防止惯性带来的危害,汽车驾驶室内前方装有气囊,后方坐椅装有靠枕,其中后方坐椅靠枕是为了防止_________(选填“撞击前车”或“后车追尾”)带来的危害。

3. 如图所示,一密闭的圆台形容器装有一定质量的水(未装满),静止放在水平桌面上,水对容器底部的压强为,现将容器倒置后静止放在水平桌面上,水对容器底部的压强为,则的大小关系为_________

4. 如图所示是家庭洗手池下面的U形管,它可以有效防止下水道的臭气传回到家里,这是利用了_________原理。

5. 如图所示的是简易自制气压计,将该气压计从大厦的1楼带到26楼,则玻璃管内的液柱高度会_________。(选填“升高”或“下降”)

6. 龙卷风的实质是高速旋转的气流,它能把地面上的物体或人畜“吸”起卷入空中,龙卷风能“吸”起物体的主要原因是龙卷风内部的气体流速______,压强______

7. 甲、乙两物体质量之比为23,放在水平地面上时,对地面的压强之比为34,则它们对地面的压力之比为_________,在地面上的受力面积之比为_________

8. 如图所示是中国空间站绕地球飞行时的场景,假设飞行时离地面的高度和速度大小均不改变,则空间站在飞行的过程中运动状态______(选填“发生改变”或“不发生改变”),空间站受到______(选填“平衡力”或“非平衡力”)的作用。

9. 如图所示,物块A静止在粗糙的水平桌面上,物块A的一部分露出桌面以外,现用一个水平方向的拉力将物块A完全拉到桌面上,此过程中物块A对桌面的压力将_________,物块A受到的摩擦力将_________。(两空均选填“变大”“不变”或“变小”)

10. 物体AB的重力均为10N,如图所示,现用一个力AB紧压在墙壁上刚好处于静止状态,则BA的摩擦力方向为_________,墙壁对A摩擦力大小为_________N

二、选择题(每小题3分,共30分;每小题给出的四个选项中,只有一个选项是符合题意的)

11. 关于压力和重力,下列说法中正确是(  )

A. 压力和重力的大小一定相同B. 压力和重力的方向一定相同

C. 压力和重力是两种不同的力D. 压力的大小一定与重力有关

12. 下列现象中与大气压强无关是(  )

A. B. 

C. D. 

13. 下列实例中,增大压强的方法与其他几个不同的是(  )

A. 图钉的前端做得很尖B. 切菜前先将刀口磨薄

C. 钉钉子时一般用重锤D. 老虎用锋利的爪子捕食

14. 鸟类是天生的飞翔高手,流线型的身体有助于减小空气的阻力,鸟类在滑翔时空气提供向上的升力,根据这个特点我们发明了飞机,请猜想飞机机翼的横截面形状应该是下图中的(  )

A. B. 

C. D. 

15. 关于惯性,下列说法中正确是(  )

A. 只有运动的物体才具有惯性

B. 奔跑的运动员很难停下来,是因为受到惯性力的作用

C. 质量一定的物体,无论静止还是运动,惯性的大小是一样的

D. 运动的物体,如果外力全部消失,有可能保持静止状态或者匀速直线运动状态

16. 玉兔号月球车的车轮做的比较宽大而且表面凹凸不平,是为了(  )

A. 减小压力,增大摩擦B. 减小压强,增大摩擦

C. 减小压强,减小摩擦D. 减小压力,减小摩擦

17. 如图所示的是著名的托里拆利实验时的情景,玻璃管竖直放置时,管内外水银面的高度差为760mm,关于该实验,下列说法中正确的是(  )

A. 换用更粗的玻璃管,管内外水银面的高度差会变小

B. 将玻璃管竖直向上提(管口未离开水银面),管内外水银面高度差会变大

C. 将玻璃管顶端开一个洞,管内水银面会回落直到与水银槽内水银面相平

D. 将玻璃管倾斜(管口未离开水银面),管内水银柱长度不变

18. 如图所示,一长方体木块放置在斜面上处于静止状态,下列关于木块受力说法中正确的是(  )

A. 木块受到的重力和支持力是一对平衡力

B. 木块受到的重力和摩擦力是一对平衡力

C. 木块对斜面的压力与木块受到的支持力是作用力与反作用力

D. 木块受到的摩擦力有可能为零

19. 一辆小车的车顶内用细线悬挂着一小球,在平直公路上向右行驶,某时刻出现如图所示的情景,下列关于小车此时的运动情况说法正确的是(  )

A. 加速运动B. 减速运动C. 匀速直线运动D. 以上都有可能

20. 如图所示在光滑的水平面上,一轻质弹簧左端固定,右端连接金属小球,O点为弹簧原长位置,用小球压缩弹簧到A位置时将小球释放,小球将在AB之间来回运动,已知,则下列说法中正确的是(  )

A. 小球从A运动到B的过程中,受到弹簧的弹力方向一直向右

B. 小球运动到O点时,弹簧弹力为零,速度最小

C. 小球在A点和B点时受到弹簧的弹力完全相同

D. 小球从A

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  1. CONNECT:[ UseTime:0.000580s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000731s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000342s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000292s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000485s ]
  6. SELECT * FROM `set` [ RunTime:0.000221s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000540s ]
  8. SELECT * FROM `article` WHERE `id` = 469467 LIMIT 1 [ RunTime:0.000597s ]
  9. UPDATE `article` SET `lasttime` = 1771735440 WHERE `id` = 469467 [ RunTime:0.000739s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000319s ]
  11. SELECT * FROM `article` WHERE `id` < 469467 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000429s ]
  12. SELECT * FROM `article` WHERE `id` > 469467 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000376s ]
  13. SELECT * FROM `article` WHERE `id` < 469467 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000745s ]
  14. SELECT * FROM `article` WHERE `id` < 469467 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000671s ]
  15. SELECT * FROM `article` WHERE `id` < 469467 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000620s ]
0.076880s