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← Challenges 📅 Daily hard

predict shock speed

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Traffic flux f(\rho)=60\rho-0.5\rho^2 (km/h). A shock connects \rho_L=65 to \rho_R=114 (vehicles/km).

Predict the shock speed \sigma=\dfrac{f(\rho_R)-f(\rho_L)}{\rho_R-\rho_L}, in km/h, then check your answer.

Close enough! points.

Not quite.

You predicted — the actual value was .

+ XP

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