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Pressure in Fluids and Atmospheric Pressure — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSPressure in Fluids and Atmospheric Pressure2 Marks
Question
A dam has broader walls at the bottom than at the top. Explain.
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Answer

The pressure exerted by a liquid increases with its depth. Thus as depth increases, more and more pressure is exerted by water on wall of the dam. A thicker wall is required to withstand greater pressure, therefore, the thickness of the wall of dam increases towards the bottom.

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