Buoyancy and Upthrust Buoyancy and upthrust are two key concepts in the field of fluid dynamics that describe the upward force exerted on an object immersed...
Buoyancy and upthrust are two key concepts in the field of fluid dynamics that describe the upward force exerted on an object immersed in a fluid and the resistance to upward displacement experienced by an object immersed in a fluid, respectively.
Buoyancy:
An object experiences buoyant force due to its own density, acting upwards on it. This upward force is equal to the weight of the fluid displaced by the object.
Upthrust:
On the other hand, upthrust is the upward force experienced by an object immersed in a fluid. It acts opposite to the weight of the fluid displaced by the object and is equal to the buoyant force experienced by the fluid.
Archimedes' Principle:
Archimedes' principle states that the buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by that object. This principle applies to both buoyant force and upthrust, meaning that they have the same magnitude but act in opposite directions.
Examples:
A floating marble in a glass of water is experiencing buoyant force.
A boat sailing through the ocean experiences upthrust due to the buoyant force exerted by the water.
A feather floating in the air is experiencing buoyant force.
A block of wood placed in a container of water will experience both buoyant force and upthrust due to the weight of the water displaced by the block