来自江皞的问题
最好能用英文结,汉语也没关系,紧急呀.At15m/sthebrakingdistanceis19m.themassofthecaris1000kg.1.calculatethekineticenergyofthecaratthisspeed.2.showthatthebrakingforceneededtostopthecarin19misabout5900m
最好能用英文结,汉语也没关系,紧急呀.
At15m/sthebrakingdistanceis19m.themassofthecaris1000kg.
1.calculatethekineticenergyofthecaratthisspeed.
2.showthatthebrakingforceneededtostopthecarin19misabout5900m.
3.whenthespeedisdoubled,theoverallstoppingdistanceismorethandoubled,explainwhy
4.explainwhythebrakingdistancechangeswhenthecarisfullyloaded.
1回答
2020-11-12 19:42