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机械刹车(除去人为因素)距离的长短,是由动能Kinetic Energy和刹车力Force决定的: | |
因为: `力 = 动能 / 距离` | |
所以:`距离 = 动能 / 力` | |
而动能本身是这样计算的: | |
`动能 = 0.5 * 质量 Mass * 速度 Velocity * 速度 Velocity` | |
因此:`距离 = 0.5 * 质量 * 速度^2 / 刹车力` | |
而 `最大刹车力 = 摩擦系数 * 重量` 并且 `重量 = 质量 * 重力加速度` | |
因此:`最短刹车距离 = 质量 * 速度^2 / (轮胎摩擦系数 * 质量 * 9.8)` | |
推出:`最短刹车距离 = 速度^2 / (轮胎摩擦系数 * 9.8)` |
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