+1 vote
in Fluid Mechanics by (118k points)
A rectangular plate surface 3m wide and 5m deep lies in fluid of specific gravity .9 such that its plane makes an angle of 45⁰ with water surface, upper edge 3m below free water surface. Determine the total pressure.

(a) 86.5 N/cm^2

(b) 173 N/cm^2

(c) 43.25 N/cm^2

(d) None of the mentioned

I had been asked this question by my college professor while I was bunking the class.

Question is taken from Horizontal and Inclined Plane Surface Submerged in a Liquid in chapter Hydrostatic Forces on Surfaces of Fluid Mechanics

1 Answer

+2 votes
by (362k points)
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Best answer
The correct option is (a) 86.5 N/cm^2

Best explanation: Total pressure, F=w*a*ŷ=w*A*(y+dsinθ)=9.81*900*15*(3+5sin45)

                                                 =86.5 N/cm^2.

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