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Beginner@Phys

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## Homework Statement

Evaluate the net force on a 200 -m high dam with a 60 mwater depth.## Homework Equations

P=F/A

p(hydrostatic pressure)=rhogh+patm

## The Attempt at a Solution

The atmospheric pressure acts on both the dam and the water, so it cancels out of the equation. g=9.8m/s^2, rho=1,000 kg/m^3,d=60m

F=P*A => dF= integral(rhogh)*(wdy) = rho*g*d*w (y) Integrated from y=0 to y=200

=(1,000 kg/m^3 *9.8m/s^2*60m*200 w )-0

But, I was not given width, so how else can I find the net force acting on the dam. All I know is that it remains constant.

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