高一物理必须修读一第1章节图像专题.ppt

Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 一、位移时间图像 1.画法：如图 横轴---时间t 纵轴---位置坐标x （对原点的位移） 2.意义： 表示位移随时间的变化规律 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. V = Δx / Δt = 斜率k ⑶求v： Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. v的大小---- 看∣k∣ 图像向上倾斜，v沿正方向 图像向下倾斜，v沿负方向 图像越陡，v越大 v的方向--- 看k 的正负 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. ⑷判断运动性质 匀速 静止 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4.说明 ⑴图像 物体实际运动轨迹 ⑵图像交点： 不是 表示相遇 图像不过原点，如图 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.意义：反映v随t的变化规律 ⑵判断运动性质 ---纵坐标的绝对值 ---纵坐标的正负 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 等于图像与时间轴所围的面积Δx = s面 时间轴以上--- s面 0， 时间轴以下----s面 0 Δx=s面正+s面负 ⑶求位移： Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. ⑷求加速度 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. a的大小---看∣k∣， 图像越陡，a越大 ； a的方向----看k的正负， （图像向上倾斜，a正值；向下倾斜，a负值） Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4.说明 ⑴图像不是运动轨迹 ⑵交点表示两物体在该时刻v同 练习：图像不过原点，如图 Evaluation on