how many trucks does it take to blow a car off the high way ? and at what speed would the trucks be going?

Answer 1

It depends on any number of variables, although I am sure someone can work out the math aftewards.

One, it depends on how much a car weighs. A heavier car will take more force to move it the set distance required to be 'off the highway'.

Second, the number of trucks cannot be answered because the variable relating to them is not in the number of trucks but in the amount of force they generate in passing.

Theoretically, all it would take would be one truck moving at a fast enough speed to generate a wake strong enough to push a car the required distance. However, considering that a car weighs in at around 3-4000 lbs, the truck would have to generate of wake force strong enough to move that 3,000 - 4,000 object approximately 20 feet. Although a typical semi could weigh in at 80,000 lbs, the amount of force they disperse in their wake (at, say, 60 mph) is only enough to knock a person off their feet, if that. So a safe bet would be that the truck would proabably have to be moving at several hundred miles an hour in order to generate a wake force strong enough to move a car, but even that is only my best guess.