運動量計算機
質量と速度から線運動量を計算し、運動量と速度から質量を計算し、または運動量と質量から速度を計算します（p = mv）。kg·m/s、g·cm/s、lb·ft/s、slug·ft/s、N·s、および一般的な質量と速度の単位の単位選択機能を備えています。
入力
運動量、質量、速度のいずれか2つがあれば、3つ目が決まります。
出力
| Quantity | Value | Other units |
|---|---|---|
| No data yet | ||
このツールを使う他の方法
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"
}'ご自身のアカウントのキーに差し替えてください。ツールのフィールドがそのままリクエストボディになります——ラッパーはありません。
AIエージェントに依頼する
Use the IOTools `momentum-calculator` tool (Momentum Calculator) on this input:
YOUR_INPUT_HEREIOTools MCPサーバーに接続された任意のエージェントにこれを貼り付け、入力内容を追加してください。
埋め込みウィジェット
<iframe
src="https://iotools.cloud/embed/momentum-calculator/"
width="100%" height="520" frameborder="0" scrolling="no" loading="lazy"
title="運動量計算機 — 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>ご自身のページに貼り付けるだけ——無料、キー不要、リンクを掲載するだけです。
| API/MCP 1回あたりの費用 | 5クレジットから |
|---|---|
| クレジットが足りませんか? | 料金を見る |
次の方法でも利用可能
ガイド
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.