ÌâÄ¿ÄÚÈÝ
Èçͼ5Ëùʾ£¬Á½µ¯»Ék1¡¢k2˩סһ¸öÖØΪ20 NµÄÎïÌåC£¬¾¢¶ÈϵÊý·Ö±ðΪk1=500 N/m,k2=250 N/m.ÏÖ½«k2µÄÁíÒ»¶ËË©ÔÚµØÃæÉÏ£¬k1µÄÁíÒ»¶ËÓÃF=15 NµÄÊúÖ±ÏòÉϵÄÁ¦Àס£¬CÎïÌå´¦ÓÚ¾²Ö¹.¹ØÓÚÁ½µ¯»ÉµÄÉìËõÇé¿öÕýÈ·µÄÊÇ£¨ÈÔÔÚµ¯ÐÔÏÞ¶ÈÄÚ£©A.k1É쳤3 cm,k2ѹËõ2 cm B.k1É쳤7 cm,k2ѹËõ8 cm
C.k1É쳤4 cm,k2ѹËõ8 cm D.k1É쳤4 cm,k2É쳤6 cm
A
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿