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Required information

The friction force between a $66-$ft square sluice gate $AB$ and its guides is equal to $10$ percent of the resultant of the

pressure forces exerted by the water on the face of the gate. Assume the weight of the gate as $1,400lb$ and the specific

gravity of water is $62\mathrm{.}4l\frac{b}{f}{t}^3.$

Determine the initial force needed to lift the gate if it weighs $1,400lb.$

The initial force needed to lift the gate is

lb $($Click to select$)vv.$