首页Home › 科学与工程Science & Engineering
🚗 刹车距离(反应 + 制动)Stopping Distance Calculator
停车距离 = 反应距离(车速 × 反应时间)+ 制动距离 v² / (2 μ g)。干燥沥青 μ ≈ 0.7,湿滑 ≈ 0.4,冰面 ≈ 0.1。本地处理。Stopping distance = reaction distance (speed × reaction time) + braking distance v² / (2 μ g). Dry asphalt μ ≈ 0.7, wet ≈ 0.4, ice ≈ 0.1. Processed locally.
使用说明与常见问题How-to & FAQ
「刹车距离(反应 + 制动)」是什么?What is the Stopping Distance Calculator tool?
停车距离 = 反应距离(车速 × 反应时间)+ 制动距离 v² / (2 μ g)。干燥沥青 μ ≈ 0.7,湿滑 ≈ 0.4,冰面 ≈ 0.1。本地处理。Stopping distance = reaction distance (speed × reaction time) + braking distance v² / (2 μ g). Dry asphalt μ ≈ 0.7, wet ≈ 0.4, ice ≈ 0.1. Processed locally.
如何使用「刹车距离(反应 + 制动)」?How do I use the Stopping Distance Calculator tool?
在「刹车距离(反应 + 制动)」中,填写「车速 km/h」、「反应时间 s」、「摩擦系数 μ」、「坡度 %(下坡为负)」等参数,结果会随输入实时计算并显示在下方。In the Stopping Distance Calculator: Fill in "Speed km/h", "Reaction time s", "Friction coefficient μ", "Grade % (downhill negative)"; results are recalculated instantly as you type.
车速翻倍?Double the speed?
制动距离与速度平方成正比,速度翻倍制动距离约为 4 倍。Braking distance grows with the square of speed - double the speed, about four times the distance.
能举个计算实例吗?Can you show a worked example?
例如在「刹车距离(反应 + 制动)」中填 车速 km/h = 100,反应时间 s = 1.5,摩擦系数 μ = 0.7,坡度 %(下坡为负) = 0,结果区显示:反应距离:41.7 m;制动距离:56.2 m;总停车距离:97.9 m;制动时间:4.05 sFor example, entering Speed km/h = 100, Reaction time s = 1.5, Friction coefficient μ = 0.7, Grade % (downhill negative) = 0 in the Stopping Distance Calculator gives: Reaction distance: 41.7 m; Braking distance: 56.2 m; Total stopping distance: 97.9 m; Braking time: 4.05 s
哪些输入会被检查?Which inputs are validated?
「刹车距离(反应 + 制动)」会检查这些输入——「车速 km/h」:必须填写,须大于 0;「反应时间 s」、「摩擦系数 μ」、「坡度 %(下坡为负)」:必须填写;绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示,不会给出数字。The Stopping Distance Calculator checks its inputs — "Speed km/h": required, must be greater than 0; "Reaction time s", "Friction coefficient μ", "Grade % (downhill negative)": required; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.
有哪些选项可以调整?What options can I adjust?
「刹车距离(反应 + 制动)」的设置:「车速 km/h」默认 100;「反应时间 s」默认 1.5;「摩擦系数 μ」默认 0.7;「坡度 %(下坡为负)」默认 0。每次生成结果都按当前设置处理。Settings in the Stopping Distance Calculator — "Speed km/h" default 100; "Reaction time s" default 1.5; "Friction coefficient μ" default 0.7; "Grade % (downhill negative)" default 0. The result always uses the current settings.
计算结果可以用于作业或工程吗?Can I use the results for homework or engineering?
「刹车距离(反应 + 制动)」使用教科书标准公式(公式写在说明和常见问题中),适合学习和估算核对;涉及安全的工程设计请以规范和实测为准。The Stopping Distance Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「刹车距离(反应 + 制动)」免费吗?需要注册吗?Is the Stopping Distance Calculator free? Do I need an account?
「刹车距离(反应 + 制动)」完全免费,无需注册或安装,打开网页即可使用,手机和电脑都能用;输入的内容只在你的浏览器本地处理。The Stopping Distance Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.