Question

Define buoyant force.​

Answer 1

Answer:

Buoyancy or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.

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Answer 2

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When an object is placed in a fluid, the fluid exerts an upward force that force we called the buoyant force.

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The buoyant force comes from the pressure exerted on the object by the fluid. Because the pressure increases as the depth increases, the pressure on the bottom of an object is always larger than the force on the top - hence the net upward force.