作者dahuanews (大话新闻)
看板Physics
标题[题目] 力学 运动学 复习
时间Wed Oct 13 19:37:01 2010
今天 在练习一篇 运动学与力学的练习卷
http://ppt.cc/6GG1
自己写过一遍了
希望大家能一起讨论研究答案
里面第五题 题义不懂
A body of mass 1 kg moving at a speed of 4 m/s starts to slide on a surface.
It slides 16 m and comes to a stop. Would any of the masses below stop in 8 m
when started at the 4 m/s speed if the surface had the same coefficient of
kinetic friction in each case?
a. 0.5 kg
b. 2 kg
c. 2.5 kg
d. 4 kg
e. All the masses would stop after sliding 16 m
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