Re: Look at it this way:
Hmm….. My car weighs about 2 tons and the tire pressure is about double the atmospheric pressure, so 3 tons would need a little more than double the atmospheric pressure to be supported properly. ;-)
Pressure = Force / Area, so I suppose that, Pressure * Area = Force
In my example the area was one square mile measured in sq. in. and pressure was 14.7 lb. per sq. in; the difference or force was 29,510,250,000 lb. (per sq. in.)
Or did the sq. in. disappear, and if so what happened to them.
How come my 4000 lb car can be supported by 30 lb. per sq. inch of air pressure.