Fluid Dynamics: Buoyancy

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- Buoyancy, a fundamental concept in fluid dynamics, explains phenomena like feeling lighter while swimming or why a massive iron ship floats while an equivalent amount of iron in a sheet forms sinks.
- When an object like a bottle is submerged in water, it experiences gravitational pull downwards. Simultaneously, water pushes it upwards, exerting an opposing force.
- If the upward force exerted by the water (buoyant force) surpasses the object’s weight, the object rises upon release.
- To submerge an object entirely in water, the upward force due to water needs to balance out.
- This balance requires an external force acting downwards to counter the difference between the upward force and the object’s weight.
- The force that the water applies upwards on an object is termed as “upthrust” or “buoyant force”.
- Every object experiences this buoyant force when immersed in a fluid. The intensity of this force depends on the fluid’s density.
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