I have a physics problem
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I have a physics problem

[From: ] [author: ] [Date: 11-11-02] [Hit: ]
what force must the Dutch boy exert to save the town?____N-In the Netherlands, a dike holds back the sea from a town below sea level The dike springs a leak 4.0 m below the water surface. If the area of the hole in the dike is 1.0 cm2,......
In the Netherlands, a dike holds back the sea from a town below sea level The dike springs a leak 4.0 m below the water surface. If the area of the hole in the dike is 1.0 cm2, what force must the Dutch boy exert to save the town?
____N

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In the Netherlands, a dike holds back the sea from a town below sea level The dike springs a leak 4.0 m below the water surface. If the area of the hole in the dike is 1.0 cm2, what force

Pressure = Density * g * depth
The pressure of the water is directly proportional to the depth.

AND

Pressure = Force ÷ area
The pressure of the water is inversely proportional to the area.

SO

Force ÷ area = Density * g * depth
Force = area * Density * g * depth
Newton = m^2 * kg/m^3 * m/s^2 * m
Newton = kg * m/s^2 OK, the units agree

Area in m^2 = 0.01^2
Density 1000 kg/m^3
g = 9.8 m/s^2

Force = 0.01^2 * 1000 * 9.8 * 4.0
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