本题目来源于试卷: Differential Calculus，类别为 IB数学
[问答题]
A ladder of length 13 m rests on horizontal ground ri l.f,i2 r +1/-v(tbjp)kof6qjhwwfand leans ag *(zsp47wpw ros3(iu)1 (jghnzrg4 rmainst a vertical wall. The bottom of the ladder is pulled away from thez)(gnw1 r4muop( *rw rs4h7zp s j3ig( wall at a constant speed of $1.2 \mathrm{~ms}^{-1}$ . Calculate the speed of descent of the top of the ladder when the bottom is 5 m away from the wall.
参考答案: 
本题详细解析:
暂无
| 
