Question

Èçͼ£¬Ò»¿éÖÊÁ¿ÎªM = 2kg£¬³¤L = 1mµÄÔÈÖÊľ°å·ÅÔÚ×ã¹»³¤µÄ¹â»¬Ë®Æ½×ÀÃæÉÏ£¬³õʼʱËÙ¶ÈΪÁ㣮°åµÄ×î×ó¶Ë·ÅÖÃÒ»¸öÖÊÁ¿m = 1kgµÄСÎï¿é£¬Ð¡Îï¿éÓëľ°å¼äµÄ¶¯Ä¦²ÁÒòÊýΪ¦Ì = 0.2£¬Ð¡Îï¿éÉÏÁ¬½ÓÒ»¸ù×ã¹»³¤µÄˮƽÇáÖÊϸÉþ£¬Ï¸Éþ¿ç¹ýλÓÚ×ÀÃæ±ßÔµµÄ¶¨»¬ÂÖ£¨Ï¸ÉþÓ뻬ÂÖ¼äµÄĦ²Á²»¼Æ£¬Ä¾°åÓ뻬ÂÖÖ®¼ä¾àÀë×ã¹»³¤£¬g = 10m/s²£©¡£
¢ÅÈôľ°å±»¹Ì¶¨£¬Ä³ÈËÒÔºãÁ¦F = 4NÏòÏÂÀ­Éþ£¬ÔòСľ¿é»¬Àëľ°åËùÐèÒªµÄʱ¼äÊǶàÉÙ£¿
¢ÆÈôľ°å²»¹Ì¶¨£¬Ä³ÈËÈÔÒÔºãÁ¦F = 4NÏòÏÂÀ­Éþ£¬ÔòСľ¿é»¬Àëľ°åËùÐèÒªµÄʱ¼äÊǶàÉÙ£¿[À´Ô´:ѧ¿ÆÍøZXXK]
¢ÇÈôÈËÒԺ㶨ËÙ¶Èv₁=1m/sÏòÏÂÔÈËÙÀ­Éþ£¬Í¬Ê±¸øľ°åÒ»¸öv₂ = 0.5m/sˮƽÏò×óµÄ³õËٶȣ¬Ôòľ¿é»¬Àëľ°åËùÓõÄʱ¼äÓÖÊǶàÉÙ£¿

Answer 1

¢Å¶ÔСÎï¿éÊÜÁ¦·ÖÎö£¬ÓÉÅ£¶ÙµÚ¶þ¶¨Âɵ㺠
¿ÉµÃ£ºa =2m/s²               ¡­  £¨2·Ö£©
Ô˶¯Ñ§¹«Ê½ ¿ÉµÃ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
¢Æ¶ÔСÎï¿é¡¢Ä¾°åÊÜÁ¦·ÖÎö£¬ÓÉÅ£¶ÙµÚ¶þ¶¨Âɵãº
£¬          ¡­¡­£¨2·Ö£©
¿ÉµÃ£ºa₁ = 2m/s²£¬a₂ = 1m/s² ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
Îï¿éµÄλÒÆ£¬Ä¾°åµÄλÒÆ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
ÓÖ  ¡­¡­¡­£¨1·Ö £©
ÓÉÒÔÉÏÈýʽ¿ÉµÃt=s ¡­¡­¡­¡­¡­£¨1·Ö£©
¢Çľ°åÏò×ó×öÔȼõËÙÔ˶¯£¬ÓÉÅ£¶ÙµÚ¶þ¶¨Âɵ㺠¡­¡­¡­¡­¡­£¨1·Ö£©
¿ÉµÃ£ºa₃ = 1m/s²£¬·½ÏòÏòÓÒ£¬¡­¡­¡­¡­¡­£¨1·Ö£©
Îï¿éÏòÓÒÔÈËÙÔ˶¯£¬ÆäλÒÆΪx₃ = v₁t   ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©
ľ°åÏò×óµÄλÒÆΪx₄= v₂t£­ ¡­¡­¡­¡­£¨1·Ö £©
ÓÖx₃£«x₄ =" L" ¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©
ÓÉÒÔÉÏÈýʽ¿ÉµÃt =" 1s" ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©

½âÎö