2019年八年级物理下册期末考试试卷.pdf

2019 年八年级物理下册期末考试试卷（人教版）时量：90 分钟，满分：100分一、单项选择题（每个2 分；共 30 分）1.在国际单位制中，焦耳是下列哪个物理量的单位（）A.力B.功C.压强D.功率2.下列关于自行车的部件设计及骑行过程中的操作，主要为了减小摩擦的是（）A.轮胎上的花纹B.车轴处装有滚珠轴承C.刹车时用力捏闸D.脚蹬表面凹凸不平3.下列实例中，为了减小压强的是（）A.B.蚊子尖尖的口器篆刻刀的刀刀很锋利C.D.破窗锤的锤头很尖骆驼宽大的脚掌4.下列工具中，属于费力杠杆的是（）A.托盘天平 B.镊子C.夹子D.羊角锤5.如图所示的四种器械中，属于省力杠杆的是（）A.B.C.D.台球杆跷跷板筷子修枝剪刀6.下列说法错误的是（）A.“天宫二号”在太空围绕地球运转的过程中，机械能守恒B.1 个标准大气压的值与高度为76cm 水银柱产生的压强大小相等C.国产大飞机C919机翼能获得升力，是应用了流体流速越大的地方压强越大的原理D.放在水平桌面上的物理课本受到的重力与桌面对它的支持力是一对平衡力7.小刚用 50N 的力将重30N 的铅球推到7m 远处，铅球在空中飞行的过程中,小刚对铅球做的功大约是（）A.350J B.210J C.0 D.100J 8.如图是滑雪运动员从山上滑下的情景，下列有关说法中正确的是（）A.运动员由于受到惯性的作用而沿斜面下滑B.从山上下滑过程中，运动员受到的重力和支持力是一对平衡力C.运动员下滑过程中，若一切外力都消失，他将立即停止运动D.运动员穿上滑雪板，是为了增大与雪地的受力面积，从而减小压强9.三个体积完全相同的物体，放入容器中静止后如图，则三个物体所受的浮力大小说法正确的是（）A.木球最大 B.铜球和铁球一样大 C.铁球最小 D.密度不同，无法判断10.下列关于运动和力的说法正确的是（）A.受平衡力作用的物体一定处于静止状态B.运动的物体一定受到力的作用C.一切物体在没有受到力的作用时，总保持静止状态或匀速直线运动状态D.离开枪膛的子弹向前飞行是因为受到惯性作用11.我国用长征二号丁运载火箭成功将世界首颗量子科学实验卫星（简称“量子卫星”）“墨子号”发射升空，如图所示，火箭在加速上升的过程中（）A.动能不变，重力势能增加，机械能增加B.动能增加，重力势能不变，机械能增加C.动能增加，重力势能增加，机械能增加D.动能不变，重力势能不变，机械能不变12.一个重 15N 的物体在水平拉力作用下，在水平面上做匀速直线运动，在3s 内移动了15m，若拉力的功率为 10W，则该物体所受的摩擦力为（）A.15N B.10N C.2N D.5N 13.如图所示，用滑轮组提升重物时，重 800N 的物体在10s 内匀速上升了1m 已知拉绳子的力F为 500N，则提升重物的过程中（）A.绳子自由端被拉下3m B.滑轮组的机械效率是80%C.做的有用功是500J D.拉力 F的功率是80W 14.如图所示，悉尼奥运会实现了火炬在水中传递，下列说法正确的是（）A.火炬在水中受到的向上的压力一定大于重力B.下潜的深度越大，火炬手受到水的压强越大文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5文档编码:CE9S10E1D7Q10 HN1A6K4C10V1 ZC4M5F3P2G5C.潜水服表面光滑是为了增大水的阻力D.火炬手向前运动，脚蹼必须向前划水15.如图所示，均匀实心圆柱体A 和 B放置在水平地面上，对地面的压强pApB，已知两个圆柱体A 和B 体积 VAVB，高度 hAhB，与地面的接触面积SA SB，若在圆柱体A 和 B 的上方，沿水平方向切去一部分，使A 和 B 剩余部分对地面的压强相等，则下列判断正确的是（）A.可能切去相同质量B.可能切去相同体积C.剩余部分的高度可能相等D.A 和 B对地面压力的变化量可能相等二、填空题（每空1分；共 18 分）16.注射器的针头做得很尖，其目的是为了增大_;注射器能将药液吸入针管是利用了_ 的作用。17.如下左图所示，我国“歼 15”舰载机已在“辽宁舰”上成功起降，“辽宁舰”成为真正意义上的航母，舰载机往航母甲板上降落时，以_为参照物，舰载机是运动的；舰载机着舰后由于_继续高速运动，所以必须适时放下着舰钩，钩住甲板上的兰阻塞，达到强行减速目的。18.如上中图是自行车手闸示意图，手闸是一个简单机械，这种简单机械的名称是_，当图中手对车闸的作用力F=10N时，刹车拉线受到力的大小为_N。19.某同学通过仔细观察发现生活中有许多简单机械，如：手钳、镊子、钥匙等等。将如上右图所示的钥匙插入锁孔转动开锁时，钥匙就相当于一个_（选填“杠杆”、“滑轮”或“轮轴”），属于 _（选填“省力”或“费力”）机械。20.下列物体的重力最接近于20N 的是 _ 一只鸡 一只羊 一个苹果 一个鸡蛋。21.潜水艇是靠 _来实现上浮和下沉的某外型确定的潜水艇从长江潜行（在水面下航行）到南海某地执行任务，若它悬浮在江水中所受的浮力为F1，悬浮在海水中所受的浮力为F2，则F1_F2（选填“大于”、“等于”或“小于”，已知海水的密度大于江水的密度）。22.小明利用吸管、细铁丝和石蜡各制作了一支简易密度计密度计的质量为lOg，放入液体中，漂浮在液面上，如下左图所示，密度计受到的浮力为_ N，排开的液体体积为_ m3 小明将密度计从水中取出后，烧杯底部受到水的压强将_。（选填“变大”、“变小”或“不变”）（g=10N/kg）文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L323.王波同学帮父母搬家，现有30 捆书籍，每捆书籍的质量都为5kg。王波想尽快将它们搬上10m 高处的新家。如上右图是王波可以提供的用于搬运物体的功率与被搬运物体质量之间的关系图像。由图可知，为了尽可能快地将这批书籍搬上新家，他每次应搬_捆。若每次下楼时间是上楼时间的一半，则他最快完成搬运任务并返回原地，所用的总时间为_s。(g=10N/kg)24.有密度分别为1、2的两种物质，若按质量1：2 混合，则所得混合物的密度为_；若按体积1：2 混合，所得的混合物的密度为_。（设总体积不变）三、计算题（25 题 6 分；26 题 12 分；共 18 分）25.把一个质量为0.2 千克的苹果竖直向上抛出，苹果在运动过程中始终受到与运动方向相反的大小为0.1牛的空气阻力求：（1）苹果所受的重力（2）苹果在上升过程中所受合力的大小.26.如图所示是我国自主研制的新型气垫两栖登陆艇。它的质量约为2.0 105kg，底面积约为500m2。求：（g 取 10N/kg）（1）它漂浮在海面上时，受到的浮力是多少？（2）登陆艇静止在水平海滩上时，对海滩的压强是多少？（3）若登陆艇用3.0 105N 的推进力，以 20m/s 的航速匀速行驶5min，则登陆艇克服阻力做的功是多少？（4）行驶 5min 内，耗油 130kg，则发动机的效率是多少？（汽油热值约为 4.6 107J/kg）（结果保留整数）文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3四、综合题（24、28、29题各 2 分计 6 分；其余每空 1 分计 28 分；共 34 分）27.如下左图所示，请画出足球在水平面上匀速滚动过程中所受重力和支持力的示意图。28.如上中图，一根均匀直杆可绕点O 转动，其中点A 处挂一重物，画出A 点所受拉力的力臂，并作出杠杆在图示位置平衡时作用在B点上最小力的示意图。29.如上右图画出滑轮组用最小力拖出陷入泥坑里的汽车的绕线方法。30.小明和小华结伴做探究“滑动摩擦力的大小与哪些因素有关”的实验。（1）小明在水平桌面上，用弹簧测力计沿_向右拉动木块，使其作匀速直线运动，弹簧测力计示数如图甲，根据_知识可知：木块所受的滑动摩擦力为_N。（2）小明将木块沿竖直方向截去一半后（如图乙），测得木块所受的滑动摩擦力变为原来一半他由此得出：滑动摩擦力的大小随接触面积的减小而减小小华认为他的探究过程不合理，存在的问题是_（3）小华在上面操作（2）的基础上，只利用现有的器材，重新进行了“滑动摩擦力的大小是否与接触面积的大小有关”的探究。请简要说明小华的做法：_。31.如图所示，在“测滑轮组机械效率”实验中，物体重为5.4N（不计绳重和摩擦）。（1）实验中，要_匀速拉动弹簧测力计，若读出了弹簧测力计的示数如图所示，用刻度尺测出了物块上升的高度为10cm，则滑轮组的机械效率是_。（2）若仅增加物体上升的高度，该滑轮组的机械效率将_（选填“增大”、“减小”或“不变”）32.物理兴趣小组的同学，利用如图所示的装置，来“探究杠杆的平衡条件”。（1）在实验前应调节杠杆两端的平衡螺母，使杠杆在水平位置平衡，这样做的好处是_；若实验前杠杆如图甲所示，可将杠杆两端的平衡螺母向_(填“左”或“右”)调节，以使杠杆在水平位置平衡.文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3（2）调节完毕后，当在杠杆B点挂 3 个质量相同的钩码，如图乙所示，那么在杠杆的D 点挂 _个质量相同的钩码，才能使杠杆恢复在水平位置平衡.当杠杆平衡后，将B、D 两点下方所挂的钩码同时向支点 O 靠近 1 个格，那么杠杆_（填“能”或“不能”）在水平位置保持平衡。33.如图所示是“探究物体动能的大小与什么因素有关”的实验装置实验中，让同一个钢球从斜面上的不用高度由静止滚下，碰到同一木块。（1）实验中，通过观察_来判断钢球动能的大小。（2）实验中，让同一个钢球从斜面上的不同高度由静止滚下，是为了探究钢球动能的大小与其_的关系。（3）如果水平面是光滑的，木块收到钢球撞击后将做_。34.在研究液体压强的实验中，进行了如图所示的操作：（1）实验前，应调整U 型管压强计，使左右两边玻璃管中的液面_，然后用手轻轻按压橡皮膜，如果两液柱没有出现高度差，说明U 型管压强计存在_问题。（2）实验中我们是通过观察比较_来比较液体内部压强大小的；（3）要探究液体压强与盛液体的容器形状是否有关，应选择：_两图进行对比，结论是：液体压强与盛液体的容器形状_。（4）在图丙中，固定 U 型管压强计金属盒的橡皮膜在盐水中的深度，使金属盒处于：向上、向下、向左、向右等方位，这是为了探究同一深度处，液体向_的压强大小关系。35.为了探究“物体的浮沉条件”，实验室提供了如下器材：弹簧测力计、烧杯、金属块、细线、水及其他简单辅助器材，实验步骤如下：（1）按如图甲所示的方法测出金属块受到的重力大小为_N。（2）按如图乙所示的方法测出金属块浸没在水中时排开水的体积为_cm3（3）金属块浸没在水中受到浮力大小为_N（g 取 10N/kg）文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3（4）金属块的密度为_kg/m3（5）比较金属块浸没在水中受到的浮力和金属块受到的重力大小，可知金属块浸没在水中时会_（填“上浮”、“悬浮”或“下沉”）。36.现有一形状不规则的木块，小明同学用图甲、乙、丙所示的方法测出了木块的密度，实验步骤如下：向容器内倒入适量的水，水的体积记作V1 将木块轻轻放入容器中，液面上升至V2；用细针将木块按压，使_，液面上升至V3。请根据实验数据计算出木块密度=_。文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2 HE7Z2B4O8P1 ZX5D9G3V6L3文档编码:CH5D4B3R6T2