(cache)Solved 3-81 Gate AB(0.6−m×0.9−m) is located at the bottom of

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Question: 3-81 Gate AB(0.6−m×0.9−m) is located at the bottom of a tank filled with methyl alcohol (SG=0.79), and hinged along its bottom edge A. Knowing that the weight of the gate is 300 N, determine the minimum force that must be applied to the cable (BCD) to open the gate. FIGURE P3-81
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Given, the dimensions of the gate, $w \times l = 0.6 m \times 0.9 m$
Hence, the surface area of the gate, $A = 0.6 m \times 0.9 m = 0.54 m^{2}$
The specific gravity of meth...
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Transcribed image text:

3-81 Gate

A B (0.6 - m \times 0.9 - m)

is located at the bottom of a tank filled with methyl alcohol

(SG = 0.79)

, and hinged along its bottom edge

A

. Knowing that the weight of the gate is

300 N

, determine the minimum force that must be applied to the cable

(BC D)

to open the gate. FIGURE P3-81