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【河北省邯郸市峰峰矿区2020-2021学年八年级下学期期末教学质量检测物理试题

  • 2026-02-17 03:09:48
【河北省邯郸市峰峰矿区2020-2021学年八年级下学期期末教学质量检测物理试题

2021学年度第二学期末教学质量检测八年级物理试卷

一、

二、择题(下列各题中只有一个选项符合题意,共15小题,每题2分,共30分)

1. 下列估测符合实际的是(  )

A. 成年人步行的速度约为 10m/sB. 中学生的身高约为 165m

C. 中学生的体重约为 500ND. 人的心脏正常跳动一次的时间约为 5s

2. 如图,足球运动员把足球踢向空中,若不计空气阻力,则下列表示足球在空中飞行时的受力图中(如图所示),正确的是(G表示重力,F表示脚对球的作用力(  )

A. B. 

C. D. 

3. 在下列图中所指出的四个力中,不是弹力的是(  )

A. 手对弹簧的拉力B. 人对跳板的压力

C. 手对弓的拉力D. 磁铁对小铁球的引力

4. 下列哪位科学家建立了运动三大定律,构建经典力学体系(  )

A. 爱因斯坦B. 牛顿C. 托里拆利D. 伽利略

5. 下列关于惯性现象的解释不正确的是(  )

A. 行驶的汽车关闭发动机后还能行驶一段距离,是因为汽车受到惯性作用

B. 小汽车配置安全带可以减小惯性带来的危害

C. 惯性的大小只与物体的质量有关

D. 抛出去的实心球还会在空中运行一段距离,是因为实心球具有惯性

6. 如图甲所示,一块长木板A放在水平桌面上。现用一水平力F,向右缓慢的推木板,使其一部分露出桌面如图乙所示,在推木板的过程中,木板对桌面的压力、压强的变化情况是(  )

A. A对桌面的压强不变B. A对桌面的压力不变

C. A对桌面的压力不断变小D. A对桌面的压强不断变小

7. 在托里拆利实验中下列哪一种情况会对测量结果产生影响(  )

A. 往水银槽内多加一些水银B. 将玻璃管稍微倾斜一些

C. 换用内径粗一些的玻璃管做实验D. 玻璃管中混进了一些空气

8. 如图所示,小明同学在倒置的漏斗里放一个乒乓球,用手指托住乒乓球,然后从漏斗口向下用力吹气,并将手指移开,结果发现乒乓球不会下落。下列对其分析正确的是(  )

A 乒乓球上方气体流速增大,压强变大B. 乒乓球上方气体流速增大,压强变小

C. 乒乓球上方气体流速减小,压强变大D. 乒乓球上方气体流速减小,压强变小

9. 把一木块浸没在水中,排开的水所受重力为12N,木块受到的浮力(  )

A. 大于12NB. 小于12NC. 等于12ND. 等于10N

10. 如图所示,同一潜水艇浮在水面时受到的浮力为F1,底部受到水的压强为P1。潜入水中时受到的浮力为F2,底部受到水的压强为P2。下列选项中正确的是(  )

A. F1=F P1<P2B. F1=FP1>P2

CF1>FP1>PD. F1<FP1<P2

11. 小王同学用100N的水平推力推动重500N的木箱,使木箱沿推力方向做匀速直线运动,木箱前进了6m,松手后木箱又向前滑行了0.5m。下列说法正确的是(  )

A. 推力做功650 JB. 小王做功3600 JC. 推力做功600 JD. 重力做功300 J

12. 一列时速为200km/h的列车从荆门站驶出,在平直轨道上匀速行驶100km,在运行过程中的机车牵引功率为4800kW.则该列火车在这段时间内所做的功、机车受到的阻力分别是(

A. 8.64×109J4.8×104NB. 8.64×109J8.64×104N

C 4.8×109J4.8×104ND. 4.8×109J8.64×104N

13. 一个小球从A点由静止开始下落,速度越来越大,相继经过BC两点,如图所示。若AB两点间的距离等于BC两点间的距离,则下列说法中不正确的是()

A. 小球在下落过程中动能不变

B. 小球在C点的重力势能小于在B点的重力势能

C. 小球所受的重力在AB段做的功等于在BC段做的功

D. 小球所受的重力在AB段做功的功率小于在BC段做功的功率

14. 简单机械与人类的生产活动息息相关,以下关于简单机械的说法中正确的是(  )

A. 指甲剪是省力机械

B. 定滑轮是省力机械

C 滑轮组既省力又省距离

D. 斜面的机械效率可以达到100%

15. 如图所示,重为G的物体在拉力F的作用下,以v的速度匀速运动了s。已知物体在水平桌面上运动时受到的摩擦阻力为物重的n分之一,不计绳重、轮与轴间的摩擦。下列说法正确的是(  )

A. 使用该滑轮组一定省力B. 拉力的功率为Fv

C. 额外功为D. 滑轮组的机械效率为

二、填空题(每小题2分,共22分)

16. 熟了的苹果向地面掉落,这是由于苹果受___________作用的原因,这个力的施力物体是___________

17. 如图所示,用细线拴一块橡皮,甩起来,使橡皮绕手做圆周运动,此时橡皮受到___________力(选填“平衡”或“非平衡”)。

18. 体重为500N小明双脚站立在水平冰面上时发现冰面有破裂的危险,他及时卧在冰面上匍匐前进,避免了意外的发生,已知两只脚与冰面的接触总面积为400cm2,则小明双脚站立时对冰面的压强为_________Pa,平卧时能避免意外发生的原因是_________

19. 如图所示,AB两物块以不同方式组合,分别静止在甲、乙两种液体中,由此可判断______;若A物块在两种液体中受到的浮力分别为FF,则F______F(均选填“>”、“<”或“=”)。

20. 小明和小聪每人把一捆质量相等的书从一楼匀速搬到三楼,小明用了,小聪只用了,则小明对书做的功_______小聪

通过网盘分享的文件:【河北省邯郸市峰峰矿区2020-2021学年八年级下学期期末教学质量检测物理试题

链接: https://pan.baidu.com/s/1iy4JwQP3GH452hURCaVV9A?pwd=4321 提取码: 4321 

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  1. CONNECT:[ UseTime:0.000413s ] mysql:host=127.0.0.1;port=3306;dbname=nowww460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000579s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000310s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000285s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000512s ]
  6. SELECT * FROM `set` [ RunTime:0.000190s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000732s ]
  8. SELECT * FROM `article` WHERE `id` = 460032 LIMIT 1 [ RunTime:0.002949s ]
  9. UPDATE `article` SET `lasttime` = 1772098333 WHERE `id` = 460032 [ RunTime:0.000940s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000240s ]
  11. SELECT * FROM `article` WHERE `id` < 460032 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003807s ]
  12. SELECT * FROM `article` WHERE `id` > 460032 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004463s ]
  13. SELECT * FROM `article` WHERE `id` < 460032 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002493s ]
  14. SELECT * FROM `article` WHERE `id` < 460032 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007783s ]
  15. SELECT * FROM `article` WHERE `id` < 460032 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005084s ]
0.100002s