Question

How does the magnitude of the buoyant force acting on the floating object compare to the weight of the object, and to the weight of the water displaced by the floating object? The wood floated and the brick did not. What conditions, in terms of forces, are required for an object to float? What conditions are required in terms of the densities of the object and the fluid for the object to float?

Answer 1

the magnitude of the buoyant force acting on the floating object is same as the weight of the water displaced by the floating object. Wood is having a specific density lower then that of water so it floated, while the brick is having a specific density higher then that of water so the brick did not floated; in terms of forces, net weight of an object should be lower than the buoyant force acting on the object to float; and in terms of the densities of the object and the fluid, the densitiy of the object to float should be lower than that of the fluid.