Question

ÖÊÁ¿Îªm=1kgµÄСÎï¿éÇáÇá·ÅÔÚˮƽÔÈËÙÔ˶¯µÄ´«ËÍ´øÉϵÄPµã£¬Ëæ´«ËÍ´øÔ˶¯µ½AµãºóˮƽÅ׳ö£¬Ð¡Îï¿éÇ¡ºÃÎÞÅöײµÄÑØÔ²»¡ÇÐÏß´ÓBµã½øÈëÊúÖ±¹â»¬Ô²¹Â¹ìµÀÏ»¬¡£B¡¢CΪԲ»¡µÄÁ½¶Ëµã£¬ÆäÁ¬Ïßˮƽ¡£ÒÑÖªÔ²»¡°ë¾¶R=1.0mÔ²»¡¶ÔÓ¦Ô²ÐĽǣ¬¹ìµÀ×îµÍµãΪO£¬Aµã¾àˮƽÃæµÄ¸ß¶Èh=0.8m¡£Ð¡Îï¿éÀ뿪CµãºóÇ¡ÄÜÎÞÅöײµÄÑع̶¨Ð±ÃæÏòÉÏÔ˶¯£¬0.8sºó¾­¹ýDµã£¬Îï¿éÓëбÃæ¼äµÄ»¬¶¯Ä¦²ÁÒòÊýΪ=0.33£¨g=10m/s2,sin37¡ã=0.6,cos37¡ã=0.8£©ÊÔÇó£º

   £¨1£©Ð¡Îï¿éÀ뿪AµãµÄˮƽ³õËÙ¶Èv1

   £¨2£©Ð¡Îï¿é¾­¹ýOµãʱ¶Ô¹ìµÀµÄѹÁ¦

   £¨3£©Ð±ÃæÉÏCD¼äµÄ¾àÀë

   £¨4£©¼ÙÉèСÎï¿éÓë´«ËÍ´ø¼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.3£¬´«ËÍ´øµÄËÙ¶ÈΪ5m/s£¬ÔòPA¼äµÄ¾àÀëÊǶàÉÙ£¿

Answer 1

½â£º£¨1£©¶ÔСÎï¿é£¬ÓÉAµ½BÓÐ

                                                                                         ¡­¡­¡­¡­1·Ö

ÔÚBµã                                                                            ¡­¡­¡­¡­2·Ö

ËùÒÔ                                                                                ¡­¡­¡­¡­1·Ö

   £¨2£©¶ÔСÎï¿é£¬ÓÉBµ½OÓÐ

                                                  ¡­¡­¡­¡­2·Ö

ÆäÖР                                                ¡­¡­¡­¡­1·Ö

ÔÚOµã                                                                     ¡­¡­¡­¡­1·Ö

ËùÒÔN=43N

ÓÉÅ£¶ÙµÚÈý¶¨ÂÉÖª¶Ô¹ìµÀµÄѹÁ¦Îª                                    ¡­¡­¡­¡­1·Ö

   £¨3£©Îï¿éÑØбÃæÉÏ»¬£º                  ¡­¡­¡­¡­1·Ö

ËùÒÔ

Îï¿éÑØбÃæÉÏ»¬£º                        ¡­¡­¡­¡­1·Ö

ÓÉ»úеÄÜÊغãÖª

СÎï¿éÓÉCÉÏÉýµ½×î¸ßµãÀúʱ                                    ¡­¡­¡­¡­1·Ö

СÎï¿éÓÉ×î¸ßµã»Øµ½DµãÀúʱ                       ¡­¡­¡­¡­1·Ö

¹Ê                                                                     ¡­¡­¡­¡­1·Ö

¼´                                                                                ¡­¡­¡­¡­1·Ö

   £¨4£©Ð¡Îï¿éÔÚ´«ËÍ´øÉϼÓËÙ¹ý³Ì£º                                ¡­¡­¡­¡­1·Ö

PA¼äµÄ¾àÀëÊÇ                                                ¡­¡­¡­¡­1·Ö