Buoyancy
The upward force exerted by a fluid on an immersed or floating body; it opposes the weight.
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Buoyant force
When a body is immersed in a fluid, the fluid exerts an upward force called the buoyant force (upthrust). It is due to the pressure difference between the top and bottom of the object. This force can support the object so it floats or partially floats.
✔ Key takeaway: Buoyancy is the upward force exerted by a fluid on an immersed body.
💭 Think about this:
Why do you feel lighter when standing in a swimming pool?