Power-energy needed vehicles

Tires, like everything that rolls, encounter resistance. The resistance encountered by the tire rolling across a surface is a major factor in determining the amount of energy needed to move vehicles. Since Dunlop s original efforts, a considerable number of tire design improvements have been made that have tended to cause a decrease in tire power consumption. For example separate plies of cotton cord were intro-... 

The term hydrogen economy refers to a situation in which most of the population s energy needs are met with hydrogen fuel instead of oil and coal. In this scenario, the economy will rely on hydrogen to power vehicles, produce electricity, and other essential activities. 

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