Question

A square plate of area 16a metre square is placed horizontally 1.2 m below the surface of water . If the atmospheric pressure be 1.013* 10 to the power 5 Newton/ m square . Calculate the total thrust acting on that plate.
Density of water 1000 kg/m cube
G= 9.8 m/ sec square

Answer 1

Dear Student
Total Pressure on the plate
$$\begin{gathered} P=Atmosphericpressure+pressureduetowater \\ P=1.013\times {10}^5+\rho gh=1.013\times {10}^5+1000\times 10\times 1.2 \\ P=1.013\times {10}^5+0.12\times {10}^5=1.133\times {10}^5 \\ ThurstF=P\times Area=1.133\times {10}^5\times 16=18.128\times {10}^5 \end{gathered}$$

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