求一道初二的物理难题.要涉及到滑轮、浮力、机械效率,如果可以加上压强.要有难度的!急要!只用初二的知识!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 15:24:44
x[Yo#ɑ+e,jyj-a0flm,zְL⡃,uHݷZ$Ւ(|h3/bH3B*+3222/"Sz_:sk"U7Wk&s79Y[HUekweMŦ<ʍId^Y鷎^$2ˢT4 ('#=Fӏya
=+}1?TVv %sc|Y;6Xh.-S{Pzٮjec,~I]חE*g]T~%2uW[T5HB5M64gg
͉uܻWB%~$ZIXs+[Lc2"NVQc:W+q\.!ѦD{c2Rt]u1',7i#@AN!f0c5wŭiab-mזd`5j0 sn/ӄ>EqmҞB"`"l~Fm;4cٔ],VCtC'_y@Z~^owo{Br;,K]dU ='.;vj
Zdn&9j^oCӋ@rO59yVnkhu2v#W"ˊVˈD,)XȞxܮH"KER5P7R
U"iMSC?! b[av7p-P<ӼّUS#=2e0aoroU6kfUj"P>';Nt.;}ͷ([:
']ƮK~xoJ"=wgbgVrCל5|T;=|{˞֢OmeZ h
%Hݓ:Q 3-*eljKfYg7{73cg8ά{پ*vK1[:ϜҁH6D rV&eknt?8Ep&IL10z
*+,qg+QJ@?4Ǭ79ft J