Physics

Why does the roof blow away during a heavy storm?

During a heavy storm such as hurricane or tornado, when a high-speed wind blows over rooftops, it creates a low pressure (P) in accordance with Bernoulli’s principle.

 

Blowing_of_Roofs_by_Wind_Storms

However, the pressure below the roof is still atmospheric(=P.). So due to this difference in the air pressure, the roof is lifted up and is then blown off by the wind.

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source:embibe.com

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