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🎢 动能势能计算器Kinetic & Potential Energy Calculator
计算物体的动能（½mv²）和重力势能（mgh），以及从该高度落下时的着地速度。Kinetic energy (½mv²), gravitational potential energy (mgh) and impact speed from that height.
使用说明与常见问题How-to & FAQ
「动能势能计算器」是什么？What is the Kinetic & Potential Energy Calculator?
计算物体的动能（½mv²）和重力势能（mgh），以及从该高度落下时的着地速度。Kinetic energy (½mv²), gravitational potential energy (mgh) and impact speed from that height.
如何使用「动能势能计算器」？How do I use the Kinetic & Potential Energy Calculator?
在「动能势能计算器」中，填写「质量 kg」、「速度 m/s」、「高度 m」、「重力加速度」等参数，结果会随输入实时计算并显示在下方。In the Kinetic & Potential Energy Calculator: Fill in "Mass kg", "Velocity m/s", "Height m", "g m/s²"; results are recalculated instantly as you type.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「动能势能计算器」使用教科书标准公式，并列出所用公式和中间值，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 Kinetic & Potential Energy Calculator uses standard textbook formulas and shows them, which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「动能势能计算器」免费吗？需要注册吗？Is the Kinetic & Potential Energy Calculator free? Do I need an account?
「动能势能计算器」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 Kinetic & Potential Energy 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.