Forensic Collision Calculator Suite

Court-ready physical calculations for speed, collinear momentum, yaw scuffs, pedestrian throws, and PyCrash planar dynamics.

Formula Inputs

Presets:

Mathematical Resolution

Brake Pressure Rise Bias: 0.0s entered. Assumes instantaneous wheel lockup, underestimating actual vehicle speed by 4 to 12 MPH (6 to 19 km/h).
[DERIVATION] Conservative Work-Energy: ΔKE = W_friction
Gravitational Constant: g = 32.174 ft/s²
Effective Friction Factor: (f ± G)·η = (0.75 + 0) × 1 = 0.7500
Locked-Skid Velocity: sqrt(2 · 32.174 · 0.7500 · 45) = 46.60 FPS
Locked-Skid Speed = 31.8 MPH
Calculated Value (IMPERIAL)31.8 MPH / 31.8 MPH / 46.60 FPS / 0.750

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