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Quiz 1.
A thin cylindrical disk of wood weighting
50 N and having diameter
of 30 cm floats on a
cylinder of water. The cylinder of water is 1 m deep
and has a diameter the same as that of the wood.
A. What is the total pressure (including atmospheric pressure) at the top of the water ?
B. What is the total pressure (including atmospheric pressure) at the bottom of the water?
Solution.
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Unformatted text preview: A. The pressure at the top of the water is atmospheric pressure plus the pressure produced by the weight of the wood cylinder. This additional pressure p’ is W/A=50/(3.1415*0.15 2 )=707 Pa. The total pressure is p’+p atm =1.013 x 10 5 +707 = 102,007 Pa. B. The pressure at the bottom is p’+p atm + ρ gh= 1.013 x 10 5 +707 + 1000 * 10 * 1 = 112,007 Pa Water Wood...
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This note was uploaded on 02/17/2009 for the course PHY na taught by Professor Richardscalettar during the Spring '09 term at UC Davis.
 Spring '09
 RichardScalettar
 Physics

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