Free Fall Model  

After building the constant velocity model and modifying it for acceleration, the students are then asked to modify the model again so that it shows the motion of a falling object. Their model should be flexible enough to allow for different accelerations due to gravity and it should show negative velocities and displacements.

THE MODELS
STELLA Version Vensim Version
Excel Version 		NetLogo Version

NETLOGO MODEL



STELLA MODEL

[Diagram Level | Equations Level | Graphs ]

 
Height(t) = Height(t - dt) + (Rate_of_change_of_Height) * dt
INIT Height = 100 {m}
Rate_of_change_of_Height = Velocity
Velocity(t) = Velocity(t - dt) + (Rate_of_Change_of_Velocity) * dt
INIT Velocity = 0 {m/s}
Rate_of_Change_of_Velocity = Acceleration_due_to_gravity
Acceleration_due_to_gravity = -9.8 {m/s^2}
Time Specs Settings
Standard: Range 0-12; dt = 0.25; Integration Method = Euler's

Home | Contact | Site Map | Search