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Question

A water bed is 2.00m on a side and 30.0cm deep. Find the pressure that the water bed exerts on the floor. Assume that the entire lower surface of the bed makes contact with the floor.
Density of water, ρ=1000kg/m3;g=10m/s2.

A
2000 Pa
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B
3000 Pa
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C
3500 Pa
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D
4000 Pa
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Solution

The correct option is C 3000 Pa
Pressure on a surface is the force applied on it perpendicularly per unit area.
Hence pressure=ForceArea
=mgA=VρgA=0.3×2×2×1000×102×2Pa
=3000Pa

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