问题标题：
一个物理题,和牛顿第一定律有关原题是英文,请牛人回答.请尽量用英文回答.Unrestrainedobjectsincarspresentsignificantriskasvehiclecomestorestsuddenlyinanemergencysituation.Statewhathappenstoanobjectbef
问题描述：
一个物理题,和牛顿第一定律有关原题是英文,请牛人回答.请尽量用英文回答.
Unrestrainedobjectsincarspresentsignificantriskasvehiclecomestorestsuddenlyinanemergencysituation.StatewhathappenstoanobjectbeforeandduringthebrakingprocessandprovideanexplanationusingNewton’sLaw(s)ofmotionandanyotherrelevantconcepts.
梁锐城回答：
Objectstomaintainuniformmotion,byacombinedforceof0,byNewton'ssecondlawofaccelerationfor0;brakingprocess,theobjectsarethereverseofthepower,speedcontinuestodecreaseuntil0orcollision.
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