414_Physics ProblemsTechnical Physics

414_Physics ProblemsTechnical Physics - 416 P14.11 Fluid...

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416 Fluid Mechanics P14.11 The excess water pressure (over air pressure) halfway down is Pg h gauge 32 kg m m s m Pa == ρ 1000 980 120 118 10 4 ej e j a f .. The force on the wall due to the water is FP A × = × gauge Pa m m N 1 18 10 2 40 9 60 2 71 10 45 . . af horizontally toward the back of the hole. P14.12 The pressure on the bottom due to the water is z b ==× 196 10 4 . P a So, FP A bb × 588 10 6 N On each end, A × = 980 10 200 196 3 Pa m kN 2 On the side, A × = 600 588 3 Pa m kN 2 P14.13 In the reference frame of the fluid, the cart’s acceleration causes a fictitious force to act backward, as if the acceleration of gravity were ga 22 + directed downward and backward at θ = F H G I K J tan 1 a g from the vertical. The center of the spherical shell is at depth d 2 below the air bubble and the pressure there is PP gh P dg a =+ = + + 00 1 2 ρρ eff . P14.14 The air outside and water inside both exert atmospheric pressure, so only the excess water pressure gh counts for the net force. Take
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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