a cyclists coasts down a 6.6读hill at a steady sped of 8km/h.assuming a total mass of 75kg,what must the cyclist's power
问题描述：
a cyclists coasts down a 6.6读hill at a steady sped of 8km/h.assuming a total mass of 75kg,what must the cyclist's power output to climb the same hill at the same speed?answer:p=375w
答
我先翻译一下题目：一个骑脚踏车的人总质量为75kg,从一个6.6°倾斜的小山下以8km/h匀速下坡,如果该人要以同样的速度匀速上坡,则他做功的功率为多少?answer ：下山重力做功功率 mgsinθV摩擦力做功等于重力做功,重...