# im not sure if this belongs here

• Feb 7th 2008, 07:32 AM
johnq86
im not sure if this belongs here
But i came across this problem and i cant seem to understand how to answer.

Pressure = force / unit area

Pressure = weight / unit area

The weight i was told to use was 175bs.

Scenario - you are standing on one square foot-12" on a side.

1) What is your pressure in pounds per square inch
2) Compare your pressure in psi to that of the atmosphere. Which is greater?
• Feb 7th 2008, 04:18 PM
kid funky fried
Quote:

Originally Posted by johnq86
But i came across this problem and i cant seem to understand how to answer.

Pressure = force / unit area

Pressure = weight / unit area

The weight i was told to use was 235lbs.

Scenario - you are standing on one square foot-12" on a side.

1) What is your pressure in pounds per square inch
2) Compare your pressure in psi to that of the atmosphere. Which is greater?

1 sq foot =144 sq inches
so, take 235/144 which equals 1.63194...
assuming that the weight is distributed equally the psi would be approx. 1.63
the psi of the atmoshere is 14.7. which is slightly over 1 ton per square foot
• Feb 8th 2008, 03:25 AM
johnq86
how do u figure out the
psi of the atmosphere?
• Feb 8th 2008, 07:27 PM
kid funky fried
the psi of the atmosphere?

the psi of the atmosphere is dependent upon your position within the atmosphere. at sea level there is a lot more air pressure than if you were standing at the top of a tall mountain.
atmospheric pressure is measured with a barometer.
so, when you ask how do i find the psi of the atmosphere it is almost like asking how do i calculate temperature .
• Feb 9th 2008, 03:35 AM
johnq86
i meant 2 say
how did u come aobut this..the psi of the atmoshere is 14.7. which is slightly over 1 ton per square foot
• Feb 9th 2008, 04:47 AM
angel.white
Quote:

Originally Posted by johnq86
how did u come aobut this..the psi of the atmoshere is 14.7. which is slightly over 1 ton per square foot

Atmospheric pressure - Wikipedia, the free encyclopedia