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Implementing wind into projectile calculation.

  1. Apr 26, 2016 #1
    1. The problem statement, all variables and given/known data
    Calculate distance of a rock thrown at certain angle, velocity and wind speed/direction.

    2. Relevant equations
    I'm using this: 2(vi^2)sin(theta)cos(theta)/9.8 to calculate the distance of the throw. How could I implement a wind value and direction into this equation? This is only a 2D simulation, so the wind would only affect the x value.

    Thanks for the help.
  2. jcsd
  3. Apr 27, 2016 #2


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    Gold Member

    Forget about equations at first ... draw a diagram and see what's going on and THEN figure out how to put it into an equation.
  4. Apr 27, 2016 #3


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    It is not a simple modification to that equation. You need to start with the differential equations of motion (ΣF=ma). In that, you will need to decide how drag affects speed. Drag force = constant x speed2 is usual.

    It is not true that wind only affects the horizontal movement. It also slows vertical descent.
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