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assignment9

# assignment9 - PHYS122 2010W Assignment 9 Due 17:00 Thursday...

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PHYS122 2010W Assignment 9 Due: 17:00 Thursday 2010-03-25

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PHYS122 Assignment 9 UW User ID: - Your UW User ID is not the same as your Student Number. Surname: Given Name: 1. A water dam is of height h and width w . Atmospheric pressure at the top of the water is P atm and the density of water is ρ . (a) (2) What is the pressure on the inner dam wall as a function of height, P ( x ) ? P ( x ) = (b) (2) What is the net force, F i , on the inner dam wall? (Hint: Unless you are clever you will need to use the equation for a non- constant force, dF = P dA , and calculate a dam integral, F = R dam dF .) F i = (c) (2) What is the net force, F o , on the outer dam wall? (Assume that the density of the air is constant and one thousand times less than that of water.) (d) (2) What is the net force, F , on the dam wall? F o = F = (e) (2) How would your answer to (d) change if you considered the air pressure constant as a function of height? Calculate the fractional change in the net force, Δ F / F .
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assignment9 - PHYS122 2010W Assignment 9 Due 17:00 Thursday...

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