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26春季玄外集团八下物理期中考试卷解析——从期中看期末

  • 2026-04-28 16:37:30
26春季玄外集团八下物理期中考试卷解析——从期中看期末

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期中考已经结束,期末考还会远吗?

学习始终是一个长期的、连续的过程,一分努力就有一分收获。

玄外的这份试卷对于孩子们来说还是比较有难度的,同时作为对八下前三章的总结,以及对期末考的复习是很有价值的。

选择题:

  • 题1-课本上第8章末【跨学科实践】的内容,拱桥相比于悬索桥、斜拉桥、钢桁(héng)架梁式桥来说,结构更为复杂,施工难度更大。小题狂做巅峰版上有相似的题,源自2025年无锡滨湖期末的材料阅读与分析;

  • 题4-直升机获得升力的原理是“力的作用是相互的”,螺旋桨给空气向下的力,空气给螺旋桨向上的力;

  • 题7-惯性分析,物体质量越大惯性越大,小车停止时,金属球惯性大于空气惯性大于氢气球惯性,金属球会向右运动,空气也向右运动,由于空气的挤压,氢气球会向左运动,小题狂做巅峰版上也有原题;

  • 题9-合力与运动的关系,摆球运动整个过程中都处于非平衡状态,两端最高点速度为零,若绳子断掉,则小球竖直往下运动;若所有外力都消失,小球则静止;中间任意位置小球的速度不为零,且速度沿切线方向,若所有外力都消失,会沿切线方向做匀直运动;

  • 题10-空心问题综合分析;

  • 题11-摩擦力与物体运动综合分析;

  • 题12-特殊方法测密度的分析与计算。

填空题:

  • 题15-惯性分析,筷子受到向下的力,往下运动,橙子由于惯性相对地面保持静止,相对于筷子会向上运动;

  • 题17-直升飞机受到的升力的施力物体是空气,静止、匀速上升、匀速下降、匀速沿倾斜方向运动都是平衡状态,升力与重力平衡,且与速度大小无关;不需要考虑空气阻力;

  • 题19-经典的蹦极模型,分析弹力的变化情况,以及弹力与重力的关系、合力与运动的关系;

解答题:

  • 题20-甲图:密度与体积和质量无关;丙图-木箱随小车向右做加速直线运动,是非平衡状态,受到水平向右的摩擦力;

  • 题21-(4)根据两个容器中液面相平,列关于体积相等的表达式即可;

  • 22-弹簧测力计改装的密度秤,属于必会题目;

  • 题23-(3)斜向上拉动木块时,拉力会产生一个向上的效果,使木块对木板的压力变小,滑动摩擦力也会变小;(4)滑动摩擦力计算公式,注意找准动摩擦因数对应的压力

  • 题24-(2)注意弹簧B要恢复部分长度,弹簧A要伸长对应长度;

  • 题26-注意审题,斜面上不需要铺材料,(4)作图不要漏画。

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往期内容:

26春季【南外】八下物理期中考试卷解析


免费无水印空白试卷电子文档:

26春季玄外集团八下物理期中考试卷.pdf

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  1. CONNECT:[ UseTime:0.000373s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000573s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000296s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000269s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000563s ]
  6. SELECT * FROM `set` [ RunTime:0.000210s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000672s ]
  8. SELECT * FROM `article` WHERE `id` = 485400 LIMIT 1 [ RunTime:0.000716s ]
  9. UPDATE `article` SET `lasttime` = 1777393499 WHERE `id` = 485400 [ RunTime:0.010835s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000284s ]
  11. SELECT * FROM `article` WHERE `id` < 485400 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000565s ]
  12. SELECT * FROM `article` WHERE `id` > 485400 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001412s ]
  13. SELECT * FROM `article` WHERE `id` < 485400 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.009120s ]
  14. SELECT * FROM `article` WHERE `id` < 485400 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001258s ]
  15. SELECT * FROM `article` WHERE `id` < 485400 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.023383s ]
0.117815s