[高中物理选修3-5§16-3动量守恒定律课件LI.pptVIP

[高中物理选修3-5§16-3动量守恒定律课件LI.ppt

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[高中物理选修3-5§16-3动量守恒定律课件LI

§16.3动量守恒定律 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. 动量守恒定律 动量定理所研究的是一个物体受力作用一段时间后,物体动量的变化,如果两个物体发生相互作用时,二者发生相互作用前后各自的动量发生什么变化,整个物体系统的动量又将如何? 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. 在冰面上静止着一个大运动员和一个小运动员,他们相互推一下,会出现什么样的情况? 演示 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. (V1V2) 解:取向右为正方向 碰撞之前总动量: P=P1+P2=m1v1+m2v2 碰撞之后总动量: P’=P’1+P’2=m1V’1+m2V’2 理论推导 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. 理论分析 2 2 2 2 2 v m v m t F - ¢ = ∵ F1 = – F2 即 ∴ 故 p = p 在碰撞过程中, 1 1 1 1 1 v m v m t F - ¢ = 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. 动量守恒定律和牛顿运动定律 用牛顿运动定律推导动量守恒定律 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. 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

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