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hobofantoday at 12:40 PM1 replyview on HN

I think the point is that while it does act as negative acceleration there isn't a causal relationship with the actual speed of the car, which is mainly related to how far the gas pedal is pressed.


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aeoniktoday at 12:47 PM

Drag is a causitive input to speed though.

    nextCarSpeed(currentSpeed, wheelPower, dragForce, mass, deltaTime) =
    currentSpeed + ((wheelPower / currentSpeed - dragForce) / mass) * deltaTime
Increase "dragForce", and the resulting car speed decreases. That is a causal input, not an association.
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