Newtons 2nd law F ma

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Michael Ruhland (Author)

WHAT IS IT? Model Name

Newton's Second Law, Acceleration of a car.

HOW IT WORKS

Students set the mass and force on the car to see how fast a car accelerates.

HOW TO USE IT

Students change either mass or force to see how it affects the acceleration. (time to complete trip across screen.)

THINGS TO NOTICE

Notice that the smoke helps visualize the acceleration

THINGS TO TRY

Adjust the mass of the car to see how this affects the acceleration of the car and the time to complete the race. Adjust the force on the car to see how this affects the acceleration and time to complete the race.

EXTENDING THE MODEL

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NETLOGO FEATURES

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Click to Run Model

globals
[
  total-distance
  cloud-color
  cloud-size
]

turtles-own
[
  mass
]

to setup
  clear-all
  ask patches [set pcolor blue]
  reset-ticks
  set total-distance 0
  set cloud-color 5
  set cloud-size 1
  
  
  
  crt 1 [
    setxy (-55) (0)
    set shape "car"
    set color red
    set size 2
    set heading 90
  ]
  crt 1 [
    setxy (55) (8)
    set shape "square"
    set color blue
    set size 1
  ]
end 

to go
    tick
    ;set total-distance (total-distance + (force / 100) / (2 * car-mass) * ticks * ticks)
    ifelse (force) / (2 * car-mass) * ticks * ticks <= 110
    [
    ask turtles with [shape = "car"]
    
    [
      hatch 1 [set shape "cloud"
        set color cloud-color
        set size cloud-size
      ]
      Set cloud-color (cloud-color + (5 / (22000) * car-mass / force) ^ .5)
      forward (force) / (2 * car-mass) * (ticks ^ 2 - (ticks - 1) ^ 2)]
    ]
    [
      ask turtles with [shape = "car"][set xcor 58]
      stop
    ]
    
   
    wait 0.01 * (2 * car-mass) / force
end

There is only one version of this model, created almost 11 years ago by Michael Ruhland.

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