A 2% difference in atmospheric pressure exists between the underside and top of a roof during strong winds. Show that the resulting lifting force on a roof that has a projected horizontal area of 2000 m(squared) is more than 4 million N.
I know that pressure=force/area so.. force=pressure x area, but I do not seem to be getting the correct area. Any help please?
2007-12-09 13:38:13 · 1 answers · asked by aasdfjkl 1 in Science & Mathematics ➔ Physics
Your equations are right so either your numbers are wrong, your arithmetic is off, or the question is wrong.
So what figure are you using for the pressure? Are you sure you got the right value in terms of force per square meter as aopposed to force per square inch, etc.?
Did the original question say the area was 2000 square meters or 2000 meters squared (i.e. 2000 m x 2000 m)?
2007-12-13 13:04:55 · answer #1 · answered by simplicitus 7 · 0⤊ 0⤋