A Vertical Gate in a Dam Is in the Shape $16.0 \mathrm{ft}$

Essay

A vertical gate in a dam is in the shape of an isosceles trapezoid $16.0 \mathrm{ft}$ across the top and $10.0 \mathrm{ft}$ across the bottom, with a height of $12.0 \mathrm{ft}$ . Find the force against the gate if the water surface is at the top of the gate.