- #1
Patricia Reid
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Homework Statement
A dam is made which is rectangular and flat in profile. It is a depth of 25m and a width of 100m and holds back fresh water which has a density of 1000 kg m3 .
What is the total force that the water exerts on the dam?
Homework Equations
F=ρA
|dF|=pdA
d/dz p=-ρg
The Attempt at a Solution
The hint given was: You will need to express the force as a function of vertical position, and then integrate over the possible values of vertical position.
So the area would be 25(100)=2500 m2.
You could also do some algebra and eventually get d/dz F=-ρgA and then you could integrate this...but it doesn't get you the correct answer.
Any help would be much appreciated!