centre of gravity and its applications

centre of gravity concept is widely applicable in day to day life. We often listen mostly lorry accidents occured. Can you imagine why that is happened? because centre of gravity is greater height comparing with other vehicles. Even centre of gravity is applicable for us also, how? if we stand on the floor because of our centre of gravity is stable and in balancing position. The roads at turnings are constructed with making some angle by one side of the road with the earth to overcome the accidents made by vehicles. Due to this reason, vehicles maintain centre of gravity  balanced. When the man is walking on a rope holding a pole in his hand is possible by balancing his centre of gravity is stable.