动量计算器
从质量和速度计算线性动量，从动量和速度计算质量，或从动量和质量计算速度（p = mv），并提供kg·m/s、g·cm/s、lb·ft/s、slug·ft/s、N·s以及常见质量和速度单位的单位选择器。
输入
动量、质量和速度中的任意两个可以确定第三个。
输出
| Quantity | Value | Other units |
|---|---|---|
| No data yet | ||
使用此工具的更多方式
REST API
curl -X POST https://api.iotools.cloud/v1/tool/momentum-calculator \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"solveFor": "momentum",
"momentum": "20",
"momentumUnit": "kgms",
"mass": "10",
"massUnit": "kg",
"velocity": "2",
"velocityUnit": "ms"
}'替换成您账户中的密钥。工具的字段即为请求体——没有额外包装。
让 AI 代理执行
Use the IOTools `momentum-calculator` tool (Momentum Calculator) on this input:
YOUR_INPUT_HERE将此粘贴给任何已连接 IOTools MCP 服务器的代理,再加上您的输入内容。
嵌入式小组件
<iframe
src="https://iotools.cloud/embed/momentum-calculator/"
width="100%" height="520" frameborder="0" scrolling="no" loading="lazy"
title="动量计算器 — iotools.cloud"
sandbox="allow-scripts allow-forms allow-same-origin allow-downloads allow-popups allow-popups-to-escape-sandbox"
allow="clipboard-write"
style="width:100%;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden"></iframe>
<script src="https://iotools.cloud/embed.js" async></script>把它放到您自己的页面上——免费,无需密钥,只需保留一个反向链接。
| 每次 API/MCP 调用费用 | 5 积分起 |
|---|---|
| 需要更多积分? | 查看定价 |
也可通过
使用指南
The Momentum Calculator solves p = mv — linear momentum, mass, or velocity — pick the quantity you're missing, supply the other two, and it converts between kg·m/s, g·cm/s, lb·ft/s, slug·ft/s, N·s, and the common mass and velocity units along the way.
The formula
p = m × vwhere p is momentum, m is mass, and v is velocity. Rearranged for the other two quantities:
m = p ÷ v
v = p ÷ mHow to use it
- Pick what you want to Solve For — Momentum, Mass, or Velocity.
- Fill in the other two fields, each with its own unit picker: kg·m/s, g·cm/s, lb·ft/s, slug·ft/s, and N·s for momentum; kg, g, mg, lb, oz, metric tons, and US (short) tons for mass; m/s, km/h, mph, ft/s, and knots for velocity.
- The result shows the solved value in every supported unit at once, so you don't need to run the calculator again just to see the same figure in lb·ft/s instead of kg·m/s.
Example
A 10 kg object moving at 2 m/s:
p = m × v = 10 kg × 2 m/s = 20 kg·m/sWhy is momentum a vector, and does this calculator handle direction?
Momentum has both magnitude and direction — two objects with equal mass and speed but opposite directions have equal-magnitude, opposite-sign momentum. This calculator works with magnitude only (the speed × mass figure), which is what most one-off "how much momentum does this have" questions need; for collision problems involving direction, treat the sign separately.
Why is N·s listed as a momentum unit?
Momentum and impulse (force × time) share the same units — a newton-second (N·s) is dimensionally identical to a kilogram-meter-per-second (kg·m/s), since a newton is a kg·m/s². They're offered as separate labels because impulse-momentum problems (e.g. "how much impulse changed this object's momentum") often quote the answer in N·s.
Privacy
All calculations run entirely in your browser. Your figures are never uploaded or stored.