人教版八年级物理下册课后练习题7.2弹力

150gA1.0N1.5NB1.0N0.5NC2.0N1.0ND2.0N1.5N2ABCD35N5NFFAF=10NF=10NBF=5NF=0NCF=5NF=10NDF=ONF=0N4k1k2k3k1k2k3abcAaBbCcD51/5ABCD6AB______________AB78ABCDACBDACBDABL0CDL0ABCDABCDL1L2L3L4abcd1abcd2acbd9NOl23456cm6.09.012.015.018.021.024.0NOl23456cm6.07.59.010.512.013.515.012ABAB31D2B3B4C5B6BA781111211912BA3