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🛷 摩擦力计算器Friction Calculator
F = μ·N：由摩擦系数和法向力（或质量与斜面角）计算摩擦力，附常见材料摩擦系数。Friction F = μ·N from the coefficient and normal force (or mass on an incline), with typical coefficients.
使用说明与常见问题How-to & FAQ
「摩擦力计算器」是什么？What is the Friction Calculator tool?
F = μ·N：由摩擦系数和法向力（或质量与斜面角）计算摩擦力，附常见材料摩擦系数。Friction F = μ·N from the coefficient and normal force (or mass on an incline), with typical coefficients.
如何使用「摩擦力计算器」？How do I use the Friction Calculator tool?
在「摩擦力计算器」中，填写「摩擦系数 μ」、「法向力来源」、「质量 (kg)」、「斜面角 (°)」、「法向力 N (牛)」等参数，结果会随输入实时计算并显示在下方。In the Friction Calculator: Fill in "Coefficient μ", "Normal force from", "Mass (kg)", "Incline angle (°)", "Normal force N (N)"; results are recalculated instantly as you type.
常见摩擦系数是多少？Typical friction coefficients?
近似值：橡胶-干沥青 0.7–0.9，木-木 0.25–0.5，钢-钢（干）0.5–0.8，冰面 0.02–0.1；实际取决于表面状况。Approximate: rubber on dry asphalt 0.7–0.9, wood on wood 0.25–0.5, dry steel on steel 0.5–0.8, ice 0.02–0.1; real values depend on the surfaces.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「摩擦力计算器」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 Friction 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.
「摩擦力计算器」免费吗？需要注册吗？Is the Friction Calculator free? Do I need an account?
「摩擦力计算器」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 Friction 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.