ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿£¨9·Ö£©¡°Ëþµõ¡±ÊDZ±º£Ð³ÇÇø½¨ÉèÖÐËæ´¦¿É¼ûµÄÒ»ÖÖÆðÖØÉ豸£¬Í¼¼×ËùʾÊÇijËþµõµÄ¹¤×÷ʾÒâͼ£¬AOÊÇËþµõµÄƽºâ±Û£¬BOÊÇËþµõµÄµõ±Û£¬CΪ¿É¿ØÖÆÒƶ¯µÄ»¬ÂÖ×éС³µ£¬¿ÉÔÚBµãµ½Oµã¼äÒƶ¯£¬AO³¤4m£¬BO³¤26m£¬AB¿ÉÈÆOµãÔÚÒ»¶¨µÄ·¶Î§ÄÚÉÏÏÂÇãб£¬ÒÑÖªA¶ËÅäÖØÎïµÄÖÊÁ¿Îª5t£¬ËþµõÀûÓù¤×÷µçѹΪ380V¡¢¶î¶¨¹¦ÂÊΪ10kWµÄµç¶¯»ú´ø¶¯»¬ÂÖ×éÀ´µõÉý¹¤µØµÄ½¨Öþ²ÄÁÏ£®ÎÊ£º
£¨1£©´Ó°²È«½Ç¶È³ö·¢£¬ÆðµõʱӦ¾¡Á¿Ê¹µõ±Ûˮƽƽºâ£¬ÔÚÒ»´ÎÔÈËÙµõÉý¸Ö²ÄʱËþµõµÄµõ±ÛÈçͼÒÒËùʾ£¬Ôò»¬ÂÖ×éС³µCÓ¦Ïò Òƶ¯£¨Ñ¡Ìî¡°×ó¡±»ò¡°ÓÒ¡±£©£¬ÕâÊǸù¾Ý ÔÀí£®
£¨2£©½«ÖÊÁ¿Îª2tµÄ¸Ö²ÄÒÔ0.5m/sµÄËÙ¶ÈÊúÖ±ÏòÉÏÔÈËÙÌáÆ𣬾1minµ½´ïÊ©¹¤Â¥²ãºóÔÙˮƽÒƶ¯20m½«¸Ö²ÄË͵½Ê©¹¤µã£¬´Ë¹ý³ÌÖÐËþµõÀÁ¦¶Ô¸Ö²ÄËù×öµÄ¹¦ÊǶàÉÙ£¿
£¨3£©´ËËþµõij´ÎµõÉý¸Ö²Äʱ£¬Ê©¹¤ÈËÔ±Òƶ¯»¬ÂÖ×éС³µCµ½´ïÀëOµã16m´¦£¬Ê¹µõ±ÛºÍƽºâ±Û¸ÕºÃ´¦ÓÚˮƽƽºâ£¬µç¶¯»úÔڶ¹¦ÂÊÏÂÊúÖ±ÏòÉÏÔÈËÙµõÉý¸Ö²Äµ½Ä³¸ß¶È£¬´Ëʱµç¶¯»ú½«µçÄÜת»¯Îª»úеÄܵÄЧÂÊΪ75%£¬Ôò¸Ö²ÄÉÏÉý¹ý³ÌÖеÄËÙ¶ÈÊǶà´ó£¿£¨µõ±Û¡¢Æ½ºâ±Û¡¢»¬ÂÖ×éµÄÖÊÁ¿¼°Ä¦²ÁÁ¦ºöÂÔ²»¼Æ£©
¡¾´ð°¸¡¿£¨1£©»¬ÂÖ×éС³µCÓ¦ÏòÓÒ£¬ÕâÊǸù¾Ý¸Ë¸ËÔÀí£»£¨2£©´Ë¹ý³ÌÖÐËþµõÀÁ¦¶Ô¸Ö²ÄËù×öµÄ¹¦ÊÇ6¡Á104J£»
£¨3£©Ôò¸Ö²ÄÉÏÉý¹ý³ÌÖеÄËÙ¶ÈÊÇ0.15m/s£®
¡¾½âÎö¡¿ÊÔÌ⣨1£©ÆðµõʱӦ¾¡Á¿Ê¹µõ±Ûˮƽƽºâ£¬¸ù¾Ý¸Ü¸ËƽºâÔÀíF1L1=F2L2£¬×ó¶ËϳÁ£¬Ó¦Ôö¼ÓÓÒ¶ËÁ¦ºÍÁ¦±ÛµÄ³Ë»ý£¬ËùÒÔ»¬ÂÖ×éС³µÓ¦ÏòÓÒÒƶ¯¡£
£¨2£©Óɵã¬ÔÚÉÏÉý¹ý³ÌÖУ¬Òƶ¯µÄ¾àÀës=vt=0.5m/s¡Á60s=30m£¬Ëþµõ¶Ô¸Ö²ÄËù×öµÄ¹¦W1=Gh=2¡Á103kg¡Á30m=6¡Á104J¡£
ÔÚˮƽÒƶ¯µÄ¹ý³ÌÖУ¬ÔÚÀÁ¦µÄ·½ÏòÉÏûÓÐÒƶ¯¾àÀ룬²»×ö¹¦£¬W2=0J£®
£¨3£©ÅäÖصÄÖØÁ¦G=mg=5¡Á103kg¡Á10N/kg=5¡Á104N£¬µõ±ÛºÍƽºâ±Û¸ÕºÃ´¦ÓÚˮƽƽºâʱ£¬==1.25¡Á104N£¬µç¶¯»úת»¯Îª»úеÄÜΪW=W¡Á75%=10kW¡Á75%=7.5kW=7500W£¬
Óɵã¬=0.15m/s£®
´ð£º£¨1£©»¬ÂÖ×éС³µCÓ¦ÏòÓÒ£¬ÕâÊǸù¾Ý¸Ë¸ËÔÀí£»£¨2£©´Ë¹ý³ÌÖÐËþµõÀÁ¦¶Ô¸Ö²ÄËù×öµÄ¹¦ÊÇ6¡Á104J£»
£¨3£©Ôò¸Ö²ÄÉÏÉý¹ý³ÌÖеÄËÙ¶ÈÊÇ0.15m/s£®
¡¾ÌâÄ¿¡¿Ð¡Ã÷ÔÚ¡°Ì½¾¿µçÁ÷Óëµç×è¹Øϵ¡±µÄʵÑéÖУ¬×¼±¸ÁËÈçÏÂʵÑéÆ÷²Ä£º¸Éµç³Ø£¬±êÓС°15¦¸ 1A¡±×ÖÑùµÄ»¬¶¯±ä×èÆ÷£¬×èÖµ·Ö±ðΪ5¦¸¡¢10¦¸¡¢20¦¸µÄ¶¨Öµµç×è¡£
£¨1£©Ð¡Ã÷Á¬½ÓÁËÏÂÃæµÄµç·£¬ÆäÖÐÓÐÒ»Ìõµ¼ÏßÁ¬½ÓÓÐÎó£¬Ç뽫Á¬½Ó´íÎóµÄµ¼Ïß´ò¡°¡Á¡±²¢»³öÕýÈ·Á¬Ïß¡£
£¨___£©
£¨2£©Åųý¹ÊÕϺó£¬Ð¡Ã÷½«5¦¸¶¨Öµµç×èÁ¬Èëµç·£¬½«»¬¶¯±ä×èÆ÷µÄ»¬Æ¬Òƶ¯µ½_____£¨Ñ¡Ìîa¡±»ò¡°b¡±£©¶Ë£¬ÔٱպϿª¹Ø£¬µ÷½Ú»¬¶¯±ä×èÆ÷µÄ»¬Æ¬£¬Ê¹µçѹ±íµÄʾÊýΪijһ¶¨Öµ£¬´ËʱµçÁ÷±íµÄʾÊýÈçͼÒÒ£¬Ê¾ÊýΪ_____A¡£
£¨3£©½ÓÏÂÀ´¶Ï¿ª¿ª¹Ø£¬È¡ÏÂ5¦¸µÄ¶¨Öµµç×裬·Ö±ð°ÑËü»»³É10¦¸¡¢20¦¸µÄ¶¨Öµµç×裬±ÕºÏ¿ª¹Ø£¬µ÷½Ú»¬¶¯±ä×èÆ÷£¬¿ØÖÆ_____£¨Ñ¡Ìî¡°µçÁ÷±í¡±»ò¡°µçѹ±í¡±£©Ê¾Êý²»±ä£¬·Ö±ð¶ÁÈ¡ÏàÓ¦µÄµçÁ÷±íʾÊý£¬¼Ç¼ÔÚ±íÖУº
ʵÑé´ÎÊý | 1 | 2 | 3 |
µç×èR/¦¸ | 5 | 10 | 20 |
µçÁ÷I/A | 0.2 | 0.1 |
£¨4£©ÓÉÊý¾Ý¿ÉÖª£ºµ±µ¼ÌåÁ½¶ËµÄµçѹһ¶¨Ê±£¬Í¨¹ýµ¼ÌåµÄµçÁ÷Óëµ¼ÌåµÄµç×è³É_____¡£
£¨5£©Ð¡Ã÷ÏëÓÃÒ»¿éµçÁ÷±íºÍÒ»¸ö¶¨Öµµç×èR0²âδ֪µç×èRxµÄ×èÖµ£¬ÓÚÊÇËûºÍͬ×éͬѧÉè¼ÆÁËÈçͼ±ûËùʾµÄµç·ͼ£¬²¢½øÐÐÈçÏÂʵÑé²Ù×÷£º
¢Ù±ÕºÏS¡¢S1£¬´ËʱµçÁ÷±íµÄʾÊýΪI£»
¢Ú±ÕºÏS¡¢¶Ï¿ªS1£¬´ËʱµçÁ÷±íµÄʾÊýΪI1£»
¢ÛÇóδ֪µç×èRxµÄ±í´ïʽΪ£ºRx£½_____¡££¨ÓÃR0¡¢I¡¢I1±íʾ£©