type | length | width | sq inches | lbs to lift | # per sq. in |
lawn bag | ________in | ________in | ________sq.in | 200# | __________psi |
refrigerator | ________in | ________in | ________sq.in | 200# | __________psi |
sandwich | ________in | ________in | ________sq.in | 200# | __________psi |
To lift a 140 pound person and the 60 pound table means you need a total force of 200 pounds of air pressure. This 200 pound force comes from the "little forces" acting on all of those "square inches of bag"
5/4s/96
process: graphing
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low pressure ------------------------ high pressure