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Both calculators run independently — change the inputs on either side to compare results.
Relativity
Length Contraction Calculator
Compute the contracted length of an object measured by an observer relative to whom it moves at high velocity, using special relativity. Returns the contracted length in the same units as the rest length.
Fill in the required fields to see your result.
Relativity
Relativistic Momentum Calculator
Compute the relativistic momentum p = γmv of a particle from its rest mass and velocity. Reduces to classical mv at low speeds but grows without bound as velocity approaches c.
Fill in the required fields to see your result.
Key differences
| Length Contraction Calculator | Relativistic Momentum Calculator | |
|---|---|---|
| Category | Relativity | Relativity |
| Inputs required | 3 | 2 |
| Result | Contracted Length (length units) | Relativistic Momentum (kg⋅m/s) |
| What it does | Compute the contracted length of an object measured by an observer relative to whom it moves at high velocity, using special relativity. Returns the contracted length in the same units as the rest length. | Compute the relativistic momentum p = γmv of a particle from its rest mass and velocity. Reduces to classical mv at low speeds but grows without bound as velocity approaches c. |