Understanding Buoyancy

* Archimedes' Principle: An object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object.

* Floating Objects: When an object floats, the buoyant force acting on it is equal to the object's weight.

Calculations

1. Weight of Displaced Water: Since the object floats with 3/4 of its volume submerged, the buoyant force is equal to the weight of the water displaced by that 3/4 volume.

2. Buoyant Force = Object's Weight: Because the object floats, the buoyant force is equal to its weight.

Therefore, the buoyant force on the object is 180 N.