Fig. 2.

The scheme of accident (illustration drawn by J. Polajnar) with the following abbreviations for model variables:

m₁ – mass of skier's upper part of body with an outer leg, ski and ski boot,

m₂ – total mass of inner leg with ski and ski boot,

m₂₁ – mass of upper part (femur) of inner leg,

m₂₂ – mass of lower part (tibia) of inner leg,

m₂₃ – mass of ski and ski boot,

L – inner leg length,

v₀ – skiing velocity,

ω – angular velocity,

Φ_C – final value of inner leg angle,

β – angle between femoral and tibial axes after a fracture,

ε – centre of rotation in the inner leg knee joint,

A – estimated area of depressed tibial plateau.