题目内容
(7分)为了探究机械能守恒定律,岳口高中的金金设计了如图甲所示的实验装置,并提供了如下的实验器材:
A小车 B钩码 C一端带滑轮的木板 D细线 E.电火花计时器 F.纸带
G.毫米刻度尺 H.低压交流电源 I.220V的交流电源
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250043090093136.png)
(1)根据上述实验装置和提供的实验器材,你认为实验中不需要的器材是 (填写器材序号),还应补充的器材是 .
(2)实验中得到了一条纸带如图乙所示,选择点迹清晰且便于测量的连续7个点(标号0~6),测出0到1、2、3、4、5、6点的距离分别为
、
、
、
、
、
,打点周期为T.则打点2时小车的速度
= ;若测得小车质量为M、钩码质量为m,打点1和点5时小车的速度分别用
、
表示,已知重力加速度为g,则验证点1与点5间系统的机械能守恒的关系式可表示为 .
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250043091812374.png)
(3)在实验数据处理时,如果以
为纵轴,以d为横轴,根据实验数据绘出
图象,其图线的斜率表示的物理量的表达式为___________.
A小车 B钩码 C一端带滑轮的木板 D细线 E.电火花计时器 F.纸带
G.毫米刻度尺 H.低压交流电源 I.220V的交流电源
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250043090093136.png)
(1)根据上述实验装置和提供的实验器材,你认为实验中不需要的器材是 (填写器材序号),还应补充的器材是 .
(2)实验中得到了一条纸带如图乙所示,选择点迹清晰且便于测量的连续7个点(标号0~6),测出0到1、2、3、4、5、6点的距离分别为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309025323.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309041360.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309056359.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309072346.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309087367.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309103360.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309119335.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309150305.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309165330.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250043091812374.png)
(3)在实验数据处理时,如果以
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309197435.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309212565.png)
(1)H(1分) 天平(1分);(2)
或
(1分),
(2分);(31)
(2分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309228717.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309243632.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250043092751305.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309290682.png)
试题分析:(1)电火花计时吕髟的是220V交流电源,因此低压交流电源用不着;另外还需要用到天平测出小车的质量M;(2)打点2时的速度等于1—3间的平均速度,即
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309228717.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250043092751305.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309337594.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309212565.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309368630.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309384561.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004309399791.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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