公路上的拱形桥是常见的汽车过桥时的运动可以看做圆�运动如图所示.设桥面的圆弧半径为r重力加速度为g质量为m的汽车在拱形桥上以速度v通过 Template


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tomski公路上的拱形桥是常见的汽车过桥时的运动可以看做圆�运动如图所示.设桥面的圆弧半径为r重力加速度为g质量为m的汽车在拱形桥上以速度v通过 coloring