Balanced and unbalanced forces

Forces like everything else can be balanced or unbalanced. If There was a log floating on water, that would be a balanced force. Since the water pushing upwards and the weight of the log  pushing downwards are equal to each other, its a balanced force. However, if an object was upon it, the weight of the log would be higher than the force of the water pushing up on it. Thus, it would be an unbalanced force and the log will sink a bit into the water. When something is being acted upon by two equal forces, we call it a balanced force. When something is being acted upon by two unequal forces, we call it an unbalanced force. http://www.khanacademy.org/science/physics/mechanics/v/balanced-and-unbalanced-forces