NCEES FE Chemical Practice Exam 2025 – All-in-One Guide to Master the Fundamentals of Engineering!

To determine the volume of an object that is floating, setting the weight of the object equal to the buoyant force provides a clear method that leverages the principles of buoyancy. When an object is floating, the buoyant force acting on it, which is equal to the weight of the fluid displaced by the object, balances out the weight of the object itself.

This relationship can be expressed mathematically:

- The buoyant force (F_b) can be calculated using Archimedes' principle, which states that this force is equal to the weight of the fluid displaced by the submerged part of the object.

- Therefore, if the weight of the object equals the buoyant force, we can express this as:

Weight of object (W) = Buoyant force (F_b)

- To find the volume (V) of the object, one can rearrange this relationship using the formula for buoyant force:

F_b = ρ_fluid * V_displaced * g,

where ρ_fluid is the density of the fluid and g is acceleration due to gravity.

By knowing the weight of the object and the density of the fluid, one can calculate the volume of the object:

V = W