Buoyancy refers to the ability of an object to float in a fluid, such as water. It is determined by the weight of the object and the amount of water it displaces.
The weight of a barbell underwater is less than its weight on land due to the upward force of buoyancy. This is because the water exerts an upward force on the barbell, reducing its overall weight.
As mentioned before, the buoyant force of the water counteracts the weight of the barbell, making it feel lighter. This is also known as the Archimedes' principle.
Buoyancy is calculated by subtracting the weight of the displaced water from the weight of the object. This can be expressed as: buoyant force = weight of the displaced fluid - weight of the object.
Buoyancy plays a significant role in sports and fitness, particularly in activities like swimming or weightlifting. The buoyant force can help athletes maintain a certain position or lift heavier weights with less effort, making it a crucial aspect of their performance.