This model can be used between the constant acceleration model and tailgate model or it can stand alone. The graphs of velocity vs. distance can be used to derive a relationship which is sometimes seen in high school algebra books. THE MODELS STELLA Version isee Player Software Right-click to download the model Braking Distance STELLA PC Braking Distance STELLA Mac Vensim Version Vensim PLE Software Right-click to download the model Braking Distance Vensim Excel Version Right-click to download the model Braking Distance Excel NetLogo Version NetLogo Software Right-click to download the model Braking Distance NetLogo NETLOGO MODEL STELLA MODEL [Diagram Level | Equations Level | Graphs ] Distance(t) = Distance(t - dt) + (rate_of_change_of_distance) * dt INIT Distance = 0 {ft} rate_of_change_of_distance = Velocity Velocity(t) = Velocity(t - dt) + (rate_of_change_of_velocity) * dt INIT Velocity = vel_in_ft_per_sec rate_of_change_of_velocity = IF (TIME >= React_Time) THEN(Acceleration) ELSE(0) Acceleration = -28 {ft/sec^2} Init_Vel = 50 {mph} React_Time = .5 {sec} vel_in_ft_per_sec = Init_Vel*5280/3600 Time Spec Settings Range: 0-6; dt = 0.05; Integration Method = Runge-Kutta 4

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