Why does your car lurch toward an oncoming truck as it passes you? I notice that the larger the truck the greater the magnitude of the lurch. Can anyone give a physical explanation to this?
 A: Bernoulli's principle, the fast moving vehicle drags air with it creating a low pressure region.  if you live in a country with high speed trains it's enough force to pull someone off a station platform if the trains don't slow down. (good explanation http://www.physics.umn.edu/outreach/pforce/circus/Bernoulli.html)
A: The incoming truck and your car are moving, so they are displacing air out of their way. That means work is produced.
That also means that Bernoulli equation has nothing to do with this. Instead, you should consider the work- energy theorem if you want to understand the reason behind the lurch. Also you should consider reading how vortices are created.
The air that the truck pushes towards your car  is the reason that your car is pushed. The turbulence and the subsequent low pressure  at the rear of the truck is the reason your car is pulled.
A: When the truck passes at high speed, that will increase the speed of the fluid around it.
A pressure difference, between the truck and the car, will occur. So the car will be towed toward the truck. According to Bernoulli principal, it states that an increase in the speed of a fluid occurs simultaneously with a decrease in static pressure or a decrease in the fluid's potential.
