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Originally Posted by kach22i
1. When imagining pressures at the front of the car I can successfully imagine the air being still and the car slamming into the air molecules.
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That's actually not a good way of thinking about it, because quite a few front-facing surfaces develop thrust (eg leading edge of bonnet/hood, top of windscreen). Instead it's much better to think of what
speed the air is going at. The slower it is going, the higher the pressure; the faster it is going, the lower the pressure.
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2. When imagining drag pulling back on the moving body/car parasitic, vortexes, and low pressure described in opening post of this thread.
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Yes, but don't forget that attached flow on the rear parts of the car can cause drag as well.