Ball Physics · Guides
Field notes from inside the engine.
Short, playable explainers on the physics that runs each sport. Read one; you'll never watch a free-kick, a bouncer or a change-up the same way.
Aerodynamics
The Magnus effect, in plain language.
Why a spinning football bends — with sliders you can play with, and no calculus you have to survive.
Bowling
Why an 18° seam swings and a 30° seam wobbles.
The seam angle sets the boundary layer's fate. A short guide to conventional swing, reverse swing and knuckle release.
Pitching
Pitch tunnels: the geometry of a hitter's mistake.
How two different pitches share a corridor for 20 feet — and separate exactly when the batter has already committed.
Passing
Pass weight: the hidden variable in every attack.
Why the same pass at the same angle can be inch-perfect or throwaway — the physics of weight into stride.
Engine
Determinism: what it means, and why we insist on it.
Same inputs, same outcomes. Why hidden RNG is intellectually lazy and what it costs the player.
Spin
Drift, dip and the geometry of a leg-break.
The Magnus effect in the opposite direction — how a spinning ball drifts before it turns.