Resultant thrust and overturning turnning moments

[speedy46]

Homework Statement

A vertical sluice gate is 5 meters wide and 3 meters deep. calculate the resultant thrust and overturnning moment when the water is level with the top edge of the gate.
Density water = 1000kg/m^3

Homework Equations

Newton's First Law F = ma

Moment = Force x Distance or M = (F)(d)

The Attempt at a Solution

I wondered if theses where the correct equations to use.

 

[tiny-tim]

Hi speedy46!

Newton's First Law F = ma

Moment = Force x Distance or M = (F)(d)
…
I wondered if theses where the correct equations to use.

F = ma is Newton's second law … and it's a law of motion, and there's no motion here, is there?

Yes, moment = force x distance, but you'll also need an equation relating force (which you don't know) to pressure (which you do).