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11. Force and Pressure
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Q65 of 100 Page 210

Explain why the walls of a dam are thicker near the bottom than at the top.

A dam is thicker at the bottom than at the top because the forces exerted are strongest close to the ground. Water pressure increases proportionally with depth, so the lower portion of the dam has greater water pressure exerted upon it. The increasing thickness of the lower dam also helps it support its own weight.


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Questions · 100
11. Force and Pressure
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