苏科版九年级物理--简单机械和功知识点及练习题(附答案)

10(F1)(F2)(L1)(L2)=2211LFLFF221.2.3.1.2.3.1.2.3.1.2.3.F=/nnGG1.122.W=FS3.J1m1JF1F2OLL231.2.3.P=W/t4.W1.2.3.=+=/WW11232W=(hhGW=FS(SW=hGS=nh(n12GFhS34WhG5=/100=/(100WWGGG412()ABCD3,2()A.0.1JB.1JC.02JD.2J4AAB.AC.BD.B56100N20N10s10mA.100WB100WC200WD20W73