ÌâÄ¿ÄÚÈÝ

Èçͼ13-1-5Ëùʾ£¬ÇáÖʵ¯»ÉµÄÒ»¶Ë¹Ì¶¨ÔÚǽÉÏ£¬ÁíÒ»¶ËÓëÖÊÁ¿ÎªmµÄÎïÌåAÏàÁ¬£¬A·ÅÔڹ⻬ˮƽÃæÉÏ£¬ÓÐÒ»ÖÊÁ¿ÓëAÏàͬµÄÎïÌåB£¬´Ó¸ßh´¦Óɾ²Ö¹¿ªÊ¼Ñع⻬ÇúÃ滬Ï£¬ÓëAÏàÅöºóÒ»Æ𽫵¯»ÉѹËõ£¬µ¯»É¸´Ô­¹ý³ÌÖÐijʱ¿ÌBÓëA·Ö¿ªÇÒÑØÔ­ÇúÃæÉÏÉý£®ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ(¡¡¡¡)£®

ͼ13-1-5

A£®µ¯»É±»Ñ¹ËõʱËù¾ßÓеÄ×î´óµ¯ÐÔÊÆÄÜΪmgh

B£®µ¯»É±»Ñ¹ËõʱËù¾ßÓеÄ×î´óµ¯ÐÔÊÆÄÜΪ

C£®BÄÜ´ïµ½µÄ×î´ó¸ß¶ÈΪ

D£®BÄÜ´ïµ½µÄ×î´ó¸ß¶ÈΪ

½âÎö¡¡¸ù¾Ý»úеÄÜÊغ㶨ÂɿɵÃB¸Õµ½´ïˮƽµØÃæµÄËÙ¶Èv0£½£¬¸ù¾Ý¶¯Á¿Êغ㶨ÂɿɵÃAÓëBÅöײºóµÄËÙ¶ÈΪv£½v0£¬ËùÒÔµ¯»É±»Ñ¹ËõʱËù¾ßÓеÄ×î´óµ¯ÐÔÊÆÄÜΪEpm£½¡¤2mv2£½mgh£¬¼´BÕýÈ·£»µ±µ¯»ÉÔٴλָ´Ô­³¤Ê±£¬AÓëB½«·Ö¿ª£¬BÒÔvµÄËÙ¶ÈÑØбÃæÉÏ»¬£¬¸ù¾Ý»úеÄÜÊغ㶨ÂɿɵÃmgh¡ä£½mv2£¬BÄÜ´ïµ½µÄ×î´ó¸ß¶ÈΪh/4£¬¼´DÕýÈ·£®

´ð°¸¡¡BD

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø