《高中物理实验用打点计时器测速度教学课件新人教必修》由会员分享，可在线阅读，更多相关《高中物理实验用打点计时器测速度教学课件新人教必修（75页珍藏版）》请在金锄头文库上搜索。
1、第四节节 实验实验 ：用打点计时计时 器测测速度Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.学习目标：1.学会使用打点计时器2学会利用打出的纸带求瞬时速度3能通过纸带上点的位置关系分析
2、物体的运动情况 4会用图象表示速度随时间变化的规律重点难点：1.打点计时器的正确使用2掌握测速度的方法Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.课前自主学习检测【实验目的】1了解打点
3、计时器的结构、原理及使用方法2会用纸带求速度及根据vt图象处理数据Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.4知识主干梳理Evaluation only.Evaluation onl
4、y. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.5Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Cre
5、ated with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.6Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyrigh
6、t 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.7Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.8Evalua
7、tion only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.9Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Cl
8、ient Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.【实验原理】 1打点计时器的原理及使用电电火花计时计时 器电电磁打点计时计时 器结结构 图图示Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Cr
9、eated with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.电电火花计时计时 器电电磁打点计时计时 器 工作 电压电压220 V交流电电6 V交流电电打点 方式周期性产产生电电火 花振针针周期性上下 振动动 打点 周期0.02 s0.02 s记录记录 信息位移、时间时间Evaluation only.Evaluation only. Created with Aspose.Slides for
10、 .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3
11、.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyrigh
12、t 2004-2011 Aspose Pty Ltd.计算出的平均速度会更接近C点的瞬时速度，然而两点距离过小，测量误差就会增大，所以两点间位移太大或太小都不合适，应该根据实际情况选取合适的两个点，一般选取距C点最近的两个点来求两点间的平均速度 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-20
13、11 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.【实验器材】打点计时器、学生电源、刻度尺、纸带、复写纸 、导线、坐标纸 【实验步骤】 1把电磁打点计时器固定在桌子上，纸带穿过限位孔，把复写纸套在定位轴上，并且压在纸带上面 2把电磁打点计时器的两个接线柱接到6 V的低压交流电源上 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET
14、 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyri
15、ght 2004-2011 Aspose Pty Ltd.7把纸带上能看得清的某个点作为起始点O，以后的点分别标上A、B、C、D作为“计数点”，如图142所示，依次测出O到A、A到B、B到C之间的距离x1、x2、x3.图142Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose
16、Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.核心要点突破Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.把数据填入下表，根据数据判断纸带是否做匀速直线运动.位置ABCDEF(xnxn1)/(m)v/(ms1)Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3
