Physics of the object is a mod that adds a new physics system for Minecraft items. Not for blocks, which will retain their usual characteristics in terms of physics, but when they become an object, such as during mining.
By installing this mod, we will realize the new physics when there are objects on the ground, for example, when thrown to the ground by a player, also in objects thrown into the sea, which will now float on water , or when breaking a chest full of items.