Elastic head-on collision velocities (Elastic 1D: v1f and v2f from m1,m2,u1,u2)
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Elastic 1D: v1f and v2f from m1,m2,u1,u2
What each symbol means
| Symbol | What it stands for |
|---|---|
| m_1,m_2 | Masses (kg) |
| u_1,u_2 | Initial velocities along line (m/s) |
| v_{1f},v_{2f} | Final velocities (m/s) |
When to use this
Smooth spheres/lines; elastic (e=1); no external impulse during collision; same sign convention for all velocities.