精选优质文档-倾情为你奉上Newtons first lawMain article: Newtons first law of motion states that objects continue to move in a state of constant velocity unless acted upon by an external or resultant force. This law is an extension of Galileos insight that constant velocity was associated with a lack of net force (see ). Newton proposed that every object with mass has an innate that functions as the fundamental equilibrium natural state in place of the Aristotelian idea of the natural state
