Question

ÈçͼËùʾΪһÕæ¿Õʾ²¨¹Ü£¬µç×Ó´ÓµÆË¿K·¢³ö£¨³õËٶȲ»¼Æ£©£¬¾­µÆË¿ÓëA°å¼äµÄ¼ÓËÙµçѹU₁¼ÓËÙ£¬´ÓA°åÖÐÐÄ¿×ÑØÖÐÐÄÏßKOÉä³ö£¬È»ºó½øÈëÁ½¿éƽÐнðÊô°åM¡¢NÐγɵÄƫתµç³¡ÖУ¨Æ«×ªµç³¡¿ÉÊÓΪÔÈÇ¿µç³¡£©£¬µç×Ó½øÈëM¡¢N¼äµç³¡Ê±µÄËÙ¶ÈÓëµç³¡·½Ïò´¹Ö±£¬µç×Ó¾­¹ýµç³¡ºó´òÔÚÓ«¹âÆÁÉϵÄPµã¡£ÒÑÖª¼ÓËÙµçѹΪU₁£¬M¡¢NÁ½°å¼äµÄµçѹΪU₂£¬Á½°å¼äµÄ¾àÀëΪd£¬°å³¤ÎªL₁£¬°åÓҶ˵½Ó«¹âÆÁµÄ¾àÀëΪL₂£¬µç×ÓµÄÖÊÁ¿Îªm£¬µçºÉÁ¿Îªe¡£Çó£º

£¨1£©µç×Ó´©¹ýA°åʱµÄËٶȴóС£»

£¨2£©µç×Ó´Óƫתµç³¡Éä³öʱµÄ²àÒÆÁ¿£»

£¨3£©Pµãµ½OµãµÄ¾àÀë¡£

Answer 1

½âÎö£º£¨1£©Éèµç×Ó¾­µçѹU₁¼ÓËÙºóµÄËÙ¶ÈΪv₀£¬¸ù¾Ý¶¯Äܶ¨ÀíµÃ£º

     e U₁=¡­¡­¡­£¨2·Ö£© ½âµÃ£º¡­¡­¡­£¨2·Ö£©

£¨2£©µç×ÓÒÔËÙ¶Èv₀½øÈëƫתµç³¡ºó£¬´¹Ö±Óڵ糡·½Ïò×÷ÔÈËÙÖ±ÏßÔ˶¯£¬Ñص糡·½Ïò×÷³õËÙ¶ÈΪÁãµÄÔȼÓËÙÖ±ÏßÔ˶¯¡£Éèƫתµç³¡µÄµç³¡Ç¿¶ÈΪE£¬µç×ÓÔÚƫתµç³¡Ô˶¯µÄʱ¼äΪt₁£¬µç×ӵļÓËÙ¶ÈΪa£¬À뿪ƫתµç³¡Ê±Ïà¶ÔÓÚÔ­Ô˶¯·½ÏòµÄ²àÒÆÁ¿Îªy₁£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂɺÍÔ˶¯Ñ§¹«Ê½µÃ£º

F=eE£¬  E= £¬ F=ma£¬    a =¡­¡­£¨3·Ö£©

t₁=£¬ y₁=£¬½âµÃ£º y₁=¡­¡­£¨3·Ö£©

£¨3£©Éèµç×ÓÀ뿪ƫתµç³¡Ê±Ñص糡·½ÏòµÄËÙ¶ÈΪv_y£¬¸ù¾ÝÔ˶¯Ñ§¹«Ê½µÃ£ºv_y=at₁=£¨2·Ö£©

µç×ÓÀ뿪ƫתµç³¡ºó×÷ÔÈËÙÖ±ÏßÔ˶¯£¬Éèµç×ÓÀ뿪ƫתµç³¡ºó´òÔÚÓ«¹âÆÁÉÏËùÓõÄʱ¼äΪt₂£¬µç×Ó´òµ½Ó«¹âÆÁÉϵIJàÒÆÁ¿Îªy₂£¬ÈçͼËùʾ

t₂=£¬ y₂= v_yt₂   ½âµÃ£ºy₂=¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©

Pµ½OµãµÄ¾àÀëΪ y=y₁+y₂=¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©