Question

When the strong/ high speed wind blows ,an umbrella held upright at times gets upturned.explain the reason

Answer 1

This is in accordance to the Bernoulli principle.
When strong or high speed wind blows,low pressure is created above the umbrella and high pressure inside the dome of it.
As air pressure tries to equalise itself,it flows from high pressure to low pressure, hence upturning the umbrella.

Thank you!

Answer 2

When strong or high speed wind blows,low pressure is created above the umbrella and high pressure inside the dome of it. As air pressure tries to equalise itself,it flows from high pressure to low pressure, hence upturning the umbrella