请出一个本试题的解析视频---**Title:** A佳查分精选—每周一题 (新高一)
**Source:**
试题来源: 长郡中学高一入学试卷
**Question Stem:**
如图甲所示，将由A部分和高为12cm的B部分组成的轻质薄壁柱形容器放在水平桌面上，并用轻杆固定一圆柱体M如图所示放置。现向容器内注水，并记录下注水体积V和液面高度h的关系，如图乙所示。当注水体积V达到850cm³后停止注水，此时水面刚好达到圆柱体M的一半。
(Given: ρ_水 = 1.0 × 10³ kg/cm³，g = 10 N/kg)
求:
**Sub-questions:**
(1) 当注水600cm³时，容器对桌面的压力；
(2) 当注水200cm³时，水对容器A部分底部的压强；
(3) 当停止注水后，将M在竖直方向移动3cm，水对容器A部分底部的压力。
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**Chart/Diagram Description:**
**Diagram 甲 (Jia):**
* **Type:** Schematic diagram of a liquid container with an immersed object.
* **Main Elements:**
* A vertically oriented container composed of two cylindrical parts: a wider lower part labeled 'A' and a narrower upper part labeled 'B'.
* The height of part B is specified as 12 cm in the problem stem.
* A cylindrical object labeled 'M' is suspended by a '轻杆' (light rod) above the container.
* The object 'M' is positioned such that its lower part extends into the upper part 'B' of the container.
* The light rod is connected to the top of object M and extends upwards.
* **Labels:** M, 轻杆 (light rod), B, A, 甲 (Jia).
**Diagram 乙 (Yi):**
* **Type:** Line chart / h-V graph (height versus volume).
* **Coordinate Axes:**
* X-axis: Labeled 'V / cm³' (Volume in cubic centimeters). The scale shows values at 0, 100, 600, 800.
* Y-axis: Labeled 'h / cm' (Height in centimeters). The scale shows values at 0, 5, 10, 15.
* **Data Points/Series:**
* The graph consists of two linear segments.
* The first segment starts from the origin (0, 0) and goes up to the point (100, 5). Dashed lines indicate this point's coordinates.
* The second segment starts from (100, 5) and goes up to the point (800, 15). Dashed lines indicate the point (800, 15).
* **Trend:** The graph shows that the liquid height 'h' increases with the injected volume 'V'. The slope changes at V = 100 cm³, h = 5 cm, indicating a change in the effective cross-sectional area of the container.
* **Labels:** h / cm, V / cm³, 乙 (Yi).
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**Other Relevant Text:**
可私信老师领取答案解析 (日期: 2025.7.30)
(Translation: You can private message the teacher to get the answer analysis (Date: 2025.7.30))