Did You Know?

The sideward tug you feel on your car when you pass a large truck going in the opposite direction is caused by air pressure. The passing vehicles form a constriction that speeds up the flow of air, reducing the air pressure between them. (It makes no difference which is moving--the air or the vehicles. The result is the same.) The higher air pressure on the other side of the car pushes it toward the truck during the split-second as they pass.