ICSE Class 9 Answered

What is mean by buoyancy

Asked by Gundala Sudarshan | 18 Aug, 2016, 03:55: PM

Expert Answer

In a column of fluid, pressure increases with the increase in depth due to the weight of the over lying fluid.
That is why the pressure at the bottom of a column of the fluid is greater than at the top of the column.
The same phenomenon causes the pressure at the bottom of an object submerged in a fluid to be greater than at the top of the object.
This difference in the pressure results in a net upwards force on the object.
Therefore an upward force exerted by a fluid that opposes the weight of an immersed object on it is called Buoyancy.
It is also known as upthrust.

Answered by Abhijeet Mishra | 19 Aug, 2016, 01:25: PM