Why objects floats on water?

Objects float on water due to the principle of buoyancy, which states that an object will float if it displaces a volume of water equal to its weight. If the object's density is less than that of water, it will float; if it's greater, it will sink. The upward buoyant force from the water counteracts the downward force of gravity on the object, allowing it to remain on the surface. This balance of forces determines whether an object sinks or floats.