初中物理两道"单选或多选"题(要求写出解题过程)1.将一动滑轮改为定滑轮使用时,与使用动滑轮比较,在相等的时间内把同一物体匀速提高到同一高度,一定( )A.提高了机械效率B.节省了力C.提高
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/07 02:18:10
![初中物理两道](/uploads/image/z/13161339-27-9.jpg?t=%E5%88%9D%E4%B8%AD%E7%89%A9%E7%90%86%E4%B8%A4%E9%81%93%22%E5%8D%95%E9%80%89%E6%88%96%E5%A4%9A%E9%80%89%22%E9%A2%98%28%E8%A6%81%E6%B1%82%E5%86%99%E5%87%BA%E8%A7%A3%E9%A2%98%E8%BF%87%E7%A8%8B%291.%E5%B0%86%E4%B8%80%E5%8A%A8%E6%BB%91%E8%BD%AE%E6%94%B9%E4%B8%BA%E5%AE%9A%E6%BB%91%E8%BD%AE%E4%BD%BF%E7%94%A8%E6%97%B6%2C%E4%B8%8E%E4%BD%BF%E7%94%A8%E5%8A%A8%E6%BB%91%E8%BD%AE%E6%AF%94%E8%BE%83%2C%E5%9C%A8%E7%9B%B8%E7%AD%89%E7%9A%84%E6%97%B6%E9%97%B4%E5%86%85%E6%8A%8A%E5%90%8C%E4%B8%80%E7%89%A9%E4%BD%93%E5%8C%80%E9%80%9F%E6%8F%90%E9%AB%98%E5%88%B0%E5%90%8C%E4%B8%80%E9%AB%98%E5%BA%A6%2C%E4%B8%80%E5%AE%9A%28+%29A.%E6%8F%90%E9%AB%98%E4%BA%86%E6%9C%BA%E6%A2%B0%E6%95%88%E7%8E%87B.%E8%8A%82%E7%9C%81%E4%BA%86%E5%8A%9BC.%E6%8F%90%E9%AB%98)
xWNV@T1<T B@ 8លx?]Ïg}_k/~zKɲm37w5/=CH.JxW4*V)Ol`Inscv^nA^ږ(nt[h{fT]k6݃Juz{trP{6
Ϩ3])Q[?غUz]ҕӏþvN&2FL@h_vR
|y28+caVۣ\^)Z(9;Ii5KxAnPnmdZwԔ Geija:+h-̋1Nx[(w8xd)Cb"Si_VtpUJiXwj[JBwry"C
rbmA9;8;
<$%Z qfޑw<