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1、精编学习资料欢迎下载南师附中树人学校初三阶段测试物理一、选择题（共12 小题，24 分）1如图所示的用具中，属于费力杠杆的是（）A食品夹B瓶盖起子C钳子D核桃夹【答案】A 2如图所示，AOB 为一杠杆，O 为支点，杠杆重不计，AOOB 在杠杆右端A处用细绳悬挂重为G 的物体，当 AO 段处于水平位置时，为保持杠杆平衡，需在B端施加最小的力为1F；当 BO 段在水平位置时保持杠杆平衡，这时在B端施加最小的力为2F，则（）A12FFB12FFC12FFD无法比较【答案】B 3如图所示是使用简单机械匀速提升相同质量物体的四种方式（不计机械自重和摩擦），其中所需动力最小的是（）ABCD【答案】B 4如
2、图所示，轻质杠杆OA 的B点挂着重物G，A端用细绳挂在圆弧EF上，此时 OA 恰成水平，且A点与圆弧形架EF的圆心重合 当绳AM的M端从E点缓慢滑到F点的过程中，绳对A点拉力的大小将（）A逐渐变小B先变小再变大C逐渐变大D先变大再变小【答案】B 精编学习资料欢迎下载5一起重机的钢索吊着重1000N 的物体匀速上升4m后，又沿水平方向缓慢移动了3m，在整个过程中，起重机的钢索对物体做的功是（）A 7000JB 4000JC 3000JD无法确定【答案】B 6如图（不计绳重与摩擦，且动滑轮重G 动小于物重G），用它们分别将质量相同的甲、乙两物体以相同速度提升相同的高度，所用的拉力分别为F甲、F乙，
3、则下列说法正确的是：（）图甲图乙A甲的拉力F甲一定小于乙的拉力F乙B甲装置的机械效率一定小于乙装置的机械效率C F甲的功率一定大于F乙的功率D F甲做的功一定小于F乙做的功【答案】D 7 2016 年南京中考体育跳绳项目测试中，小华同学在1min内跳了 150次，则他跳一次绳做的功和跳绳时的功率大约是（）A 0.05J0.5 WB 30J3 0 WC 30J7 5 WD 3600J6 0 0 W【答案】C 8用一个定滑轮和一个动滑轮组成的滑轮组把重为150N 的物体匀速提升1m不计摩擦和绳重，滑轮组的机械效率为60%，则下列选项错误的是（）A动滑轮重一定是100NB有用功一定是150JC总功一
4、定是250JD拉力大小一定是125N【答案】D 9如图所示，将一小钢球从a点竖直向上抛出（不计空气阻力），经过 b 点到达最高点c时速度为零，图中habhbc，下列判断正确的是（）A小钢球在ac段重力势能的增加量与动能的减小量相等B小钢球运动到最高点c时所受的合力为零C小钢球在ab 段克服重力做功小于在bc 段克服重力做功D就a、b、c三点而言，小钢球在a点具有的机械能最大【答案】A 10关于温度、热量和内能，下列说法正确的是（）A温度高的物体内能一定大，温度低的物体内能一定小文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3
5、 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6
6、X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4
7、 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7
8、T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R
9、4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:
10、CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y
11、10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4精编学习资料欢迎下载B物体的内能与温度有关，只要温度不变，物体的内能就一定不变C物体的温度越高，所含热量越多D内能小的物体也可能将热量传递给内能大的物体【答案】D 11如图所示是模拟过山车的实验装置，小球沿轨道由静止从a点先后经过b、c、d、e四点运动到f 点，c、e两点的高度相同，下
12、列说法正确的是（）A小球从a点运动到 b点的过程中，动能转化为势能B小球运动到点c时的机械能比它运动到点d 时机械能小C小球运动到点c时的机械能于它运动到点e时机械能相等D小球运动到点c时的动能大于它运动到点e动能【答案】B 12用相同的滑轮和绳子分别组成如图所示的甲、乙两个滑轮组，绳子所能承受的最大拉力相同不计绳重及摩擦，两装置匀速提升物体的重力最大时，则下列说法正确的是（）甲乙A提起最大重物的重力大小不相等，甲滑轮组的机械效率高B提起最大重物的重力大小不相等，乙滑轮组的机械效率高C提起最大重物的重力大小相等，滑轮组的机械效率相同D提起最大重物的重力大小不相等，滑轮组的机械效率相同【答案】B
13、 二、填空（每空1 分，共 21 分）13已知作用在某杠杆上的动力是4N，阻力是 10N，阻力臂长是8cm，为使杠杆平衡，则动力臂长为_cm，若将阻力增大5N，不改变力臂的长短，动力应增大_ N【答案】20；214运动员短时间内的功率可达1kW，它的物理意义是_；下列单位：J、J/s、Nm、W s中属于功率的单位有_，两台机器的实际功率之比为5:1，则做同样的功所需的时间之比是_【答案】每秒钟做1000J 的功；J/s；1:5文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文
14、档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG
15、3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10
16、N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 H
17、B6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3
18、I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 Z
19、E8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9
20、V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4精编学习资料欢迎下载15 如图甲所示，木块放在水平面上，用弹簧测力计沿水平方向拉木块做直线运动两次拉动木块得到的st图象分别是图乙中的图线、两次对应的弹簧测力计示数分别为1F、2F，两次拉力的功率分别为1P、2P，则1F _2F，1P _2P （均选填“”、“”或“”）图甲图乙【答案】；16如图所示，物体A和B所受重力都为120N，滑轮
21、重力20N；绳重和摩擦力不计，当分别用力匀速提升物体A和B时，AF 为_ N，BF 为_ N【答案】70；12017如图，将重物从长4m、高1m的斜面底部匀速推上斜面顶端已知沿斜面所用的推力是300N，斜面的机械效率是75%，则推力做的总功是_ J，推力做的有用功是_ J，物体的重力是_ N【答案】1200J；900J；900N 18如图所示为测量滑轮组机械效率的实验装置，钩码总重6N 实验时竖直向上匀速拉动弹簧测力计，将弹簧测力计向上移动15cm，滑轮组做的有用功为_ J，该滑轮组的机械效率为_（精确到 0.1%）【答案】0.3；83.3%文档编码:CG3H6Y10N1S3 HB6X6X3I
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23、8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V
24、10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档
25、编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3
26、H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N
27、1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB
28、6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4精编学习资料欢迎下载19如图是某球员传球时足球的一段运动轨迹，其中球在A点的重力势能 _（选填“大于”、“小于”或“等于”）B点的重力势能 若不计空气阻力，足球在下落的过程中，_能转化为 _能【答案】小于；重力势；动20
29、“热”字有多种含义，在物理学中有时表示温度，有时表示热量，有时表示内能则“物体吸热温度会升高”中的“热”表示的是_；“沸腾的水很热”中的“热”表示的是_【答案】热量；温度21如图所示，用酒精灯加热弯曲的钢棒，发现杯内水的温度会升高，即水的内能会_，这一实验表明用 _的方法可以使物体的内能发生改变【答案】增大，热传递三、解答题（共9 题，55 分）22（6 分）按照题目要求作图：（1）在如图甲中画出滑轮组最省力的绕线方式；（2）在如图乙中一根均匀直杆可绕点O 转动，点A处挂一重物，画出A点所受拉力2F 及其力臂，并画出杠杆在图示位置平衡时作用在B点上最小力的示意图；（3）在如图丙中画出力臂1L
30、对应的力1F 图甲图乙图丙【答案】文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 Z
31、E8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9
32、V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文
33、档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG
34、3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10
35、N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 H
36、B6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4精编学习资料欢迎下载23（9 分）（1）在“探究杠杆平衡条件”实验中，应先调节杠杆两端的平衡螺母，使杠杆在水平位置平衡，这样做是为了便
37、于测量_；如发现杠杆左端偏高，则可讲右端的平衡螺母向_调节；（2）某同学在一根有等间距刻度的均匀杠杆两侧挂上每个质量都相等的钩码进行实验杠杆静止于水平状态的三次实验情景如图甲所示，根据图甲的实验，该同学得出结论：只要满足“阻力阻力作用点到支点的距离动力动力作用点到支点的距离”，杠杆就能平衡a这个结论是否正确？_ b用图乙所示的装置，怎样通过实验来说明该结论是否正确？_ 图甲图乙（3）实验时只有8个相同的钩码，杠杆上每格等距，如图甲，当在A点挂4个钩码时，则怎样挂钩码可以使杠杆在水平位置平衡？图甲在支点右侧第三格处挂_个钩码；在支点右侧第四格处挂_个钩码文档编码:CG3H6Y10N1S3 HB6
38、X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8
39、V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8
40、H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V1
41、0R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编
42、码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H
43、6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1
44、S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4精编学习资料欢迎下载图乙（4）如图乙是小明同学三次实验的情景，实验时所用的每个钩码重0.5N，杠杆上每一格长5cm，部分实验数据已记录在下表中将表格中的实验数据补充完整实验次数动力1/NF动力臂1/cmL阻力2
45、/NF阻力臂2/cmL11.510121201031201.510（5）小明的第 3次实验存在错误，其错误是_【答案】（1）力臂；左不正确；1将弹簧测力计斜向右（或斜向左）拉，保持杠杆水平平衡；2读出动力：测力计的示数1FF1；量出动力作用点到支点的距离1L；3用测力计测出三个钩码的重力即阻力大小2F，量出阻力作用点到支点的距离2L；4计算11FL 的值与22FL 的值，再进行比较，可以得出上述结论不正确4；315；2弹簧测力计没有竖直向下拉（或动力臂测量错误）24（3 分）如图，小明用定滑轮提起重10N 的物体，若用弹簧测力计分别沿着方向1、2、3拉着物体匀速上升时，拉力分别是1F、2F、3
46、F，则它们的大小关系是_这证明使用定滑轮可以改变力的_，不能改变力的_【答案】123FFF；方向；大小25（6 分）测量两位同学从一楼登上到三楼做功快慢的实验：（1）已提供的器材是磅秤和皮尺，还需要的器材是_；（2）下表是两位同学的实验数据：同学实验次数做功时间（秒）做功（焦）甲1306000甲26012000乙3304000乙4306000文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档
47、编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3
48、H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N
49、1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB
50、6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I8V4 ZE8H7T9V10R4文档编码:CG3H6Y10N1S3 HB6X6X3I