物理-1-5“速度变化快慢的描述──加速度”演示课件[新人教版必须修读1].ppt

1.5 速度变化快慢的描述——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. 车型 奔驰S500 富康1.6L 桑塔纳1.6L 红旗世纪星2.4L 法拉力F430 宝马730 速度变化量 0～100km/h 0～100km/h 0～100km/h 0～100km/h 0～100km/h 0～100km/h 所需时间 5.6S 17.3S 17.9S 11.4S 4.0S 7.9S Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 位移： 正负号表示位移的方向 x/m 0 v/ m●s-1 0 速度的变化量该如何表示？ 速度的变化量： Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. A、自行车下坡 B、公共汽车出站 V0 (m/s) 2 0 △t ( s ) 3 3 V (m/s) 11 6 △V (m/s) 9 6 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. A、自行车下坡 B、公共汽车出站 C、某舰艇出航 V0 (m/s) 2 0 0 △t ( s ) 3 3 20 V (m/s) 11 6 6 △V (m/s) 6 9 6 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. A、自行车下坡 B、公共汽车出站 C、某舰艇出航 D、火车出站 V0 (m/s) 2 0 0 0 △t ( s ) 3 3 20 100 V (m/s) 11 6 6 20 △V (m/s) 6 20 9 6 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. A、自行车下坡 B、公共汽车出站 C、某舰艇出航 D、火车出站 E、飞机匀速飞行 V0 (m/s) 2 0 0 0 300 △t ( s ) 3 3 20 100 10 V (m/s) 11 6 6 20 300 △V (m/s) 0 9 6 6 20 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. A、自行车下坡 B、公共汽车出站 C、某舰艇出航 D、火车出站 E、飞机匀速飞行 V0 (m/s) 2 0 0 0 300 △t ( s ) 3 3 20 100 10 V (m/s) 11 6 6 20 300 △V (m/s) △v/△t (m/s2) 3 2 0.3 0.2 0 9 6 6 20 0 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1、加速运动 2、减速运动 0 1 2 0 1 2 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 瞬时速度 瞬时加速度 运动过程中，加速度保持不变的运动叫匀变速直线运动。 取很小很小的值 取很小很小的值 Evaluation only. Created with Aspose.Slides for .NET 3.