Most Collisions Are Secretly in One Dimension

From “Minute Physics”. ( YouTube / Nebula )

The first 200 people to get 20% off an annual Premium subscription to Brilliant.

This video is about elastic and inelastic collisions in 1D, 2D and 3D – and how the collision of conservation of energy with conservation of momentum, plus a secret direction, results in a completely predetermined behavior for most collisions.


1D Collision Calculator:

Elastic collision of spheres Wolfram

Oblique collisions of two 2D spheres

Ballistic Pendulum

Support MinutePhysics on Patreon!
Link to Patreon Supporters:

MinutePhysics is on twitter – @minutephysics
And facebook –

Minute Physics provides an energetic and entertaining view of old and new problems in physics — all in a minute!

Created by Henry Reich