ÌâÄ¿ÄÚÈÝ

ÈçÓÒͼËùʾ£¬Í¼Ðΰ¼²Û°ë¾¶R=30cm£¬ÖÊÁ¿m=1kgµÄСÎï¿éÔÚÑØ°ë¾¶·½ÏòµÄÇᵯ»É¼·Ñ¹Ï´¦ÓÚ¾²Ö¹×´Ì¬¡£ÒÑÖªµ¯»ÉµÄ¾¢¶ÈϵÊýk=50N/m£¬×ÔÓɳ¤¶ÈL=40cm£¬Ò»¶Ë¹Ì¶¨ÔÚÔ²ÐÄO´¦£¬µ¯»ÉÓëÊúÖ±·½ÏòµÄ¼Ð½ÇΪ37¡ã¡£È¡g=10m/s2£¬sin37¡ã=0.6£¬cos37¡ã=0.8¡£Ôò                                                                     £¨     £©

A£®Îï¿é¶Ô²ÛµÄѹÁ¦´óСÊÇ15N

B£®Îï¿é¶Ô²ÛµÄѹÁ¦´óСÊÇ13N

C£®²Û¶ÔÎï¿éµÄĦ²ÁÁ¦´óСÊÇ6N

D£®²Û¶ÔÎï¿éµÄĦ²ÁÁ¦´óСÊÇ8N

 

¡¾´ð°¸¡¿

BC

¡¾½âÎö¡¿ÓÉÊÜÁ¦·ÖÎö¿ÉÖªÎïÌåÍ˲۵ÄѹÁ¦£¬²Û¶ÔÎï¿éµÄĦ²ÁÁ¦

 

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø