why haven\'t we used the formula h-bar=d/2 in the above question even if the pla

Question

why haven't we used the formula h-bar=d/2 in the above question even if the plate is circular

HYDROSTATIC PRESSURE EXAMPLE 3.21 A eircular plate of 3 m diameter is under water with its plane making an angle of 30 with water surface. If the top edge ofthe plate is 1 m below the water surface, find the force on- one side of the plate and its location Solution: Given d-3 m CB= 1m 1+1.5 x 0.5 =1.75 m FIG. 3.26 Area of the plate. A = nd. #7.07 m 64 64 Force, Fs acAh 9810 x .07 x 1.75 = 121374.23 N 121.37 KN Ans. s -depth of centre of pressure 3.98 x (sin 30 07x75 1.75 1.83 m Ah #008 + 1 75 m Ans. Circle 64

Explanation / Answer

plate is circular but it is below the surface of water and we have to take hbar from the water level.

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