Diving: Physics of Rotation, Entry and Rip Entry Technique

Status: draft · Confidence: medium (0.625) · Basis: verified_sources

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## TL;DR

Competitive diving: 1.5-second flight transforms via conservation of angular momentum. Tuck reduces moment of inertia 3-4×, angular velocity increases proportionally. Rip entry creates 25-35cm hole — splashless through body alignment into vanishingly small entry.

## Core Explanation

Phases: takeoff (10m platform, 1.7s; 3m springboard, 1.4s), flight (tuck=pike=straight positions), entry (within 7° of vertical). Angular momentum: L=Iω. Tuck I=3-4 kg·m², straight I=12-15 kg·m². DD range 1.2-4.8. Scoring: 7 judges, trim top/bottom 2, sum middle 3 × DD.

## Detailed Analysis

[待后续补充。]

## Further Reading

- [Source 1 — Diving: Physics of Rotation, Entry and Rip Entry Technique](https://www.fina.org/)

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