Question

9£®½áºÏÎÒ¹ú¹úÇ飬¿Æ¼¼ÈËÔ±¿ª·¢ÑÐÖÆÁËÒ»ÖÖÐÂÐ͵ġ°ÂÌÉ«½»Í¨¹¤¾ß¡±--µç¶¯×ÔÐгµ£¬ËüÓõ綯ÊÆΪ36VµÄÐîµç³Ø×÷ΪµçÔ´£¬Ðîµç³ØÄÚ×èºÜС£¬Çý¶¯¡°36V  150W¡±µÄµç¶¯»ú£®£¨g=10m/s²£©
£¨1£©µç¶¯×ÔÐгµ±»³ÆΪÊÇ¡°ÂÌÉ«½»Í¨¹¤¾ß¡±ÒòΪÆäÏûºÄµçÄÜ£¬Ã»ÓÐÅÅ·ÅÎ
£¨2£©ÉèÈ˺ͳµµÄ×ÜÖÊÁ¿Îª100kg£¬µç¶¯×ÔÐгµÊܵ½µÄ×èÁ¦ÊÇÈ˳µ×ÜÁ¿µÄ0.03±¶£¬µ±×ÔÐгµ³µËÙΪ1m/sʱ£¬×î´óÐÐÊ»¼ÓËÙ¶È1.2m/s²£®
£¨3£©µç¶¯×ÔÐгµÐîµç³ØÔÚ³äµçºóʵÑé·Åµçʱ£¬ÓÃ2AµÄµçÁ÷·Åµç£¬¿ÉÒԷŵç6h£¬Ôòµç¶¯×ÔÐгµÒÔ×î´óÐÐÊ»ËÙ¶ÈÐÐʻʱ£¬×ʱ¼äÊÇ2.88h£¬ÐÐÊ»¾àÀëÊÇ51.84km£®
£¨4£©µç¶¯×ÔÐгµÔÚ³äµçʱ£¬ÄÜÁ¿×ª»»µÄÐÎʽÊǵçÄÜת»¯Îª»¯Ñ§ÄÜ£¬¸ßËÙÐÐÊ»¹ý³ÌÖÐÄÜÁ¿µÄת»»ÐÎʽÊÇ»¯Ñ§ÄÜת»¯ÎªµçÄÜÔÙת»¯Îª»úеÄÜ£¬×îºóתΪÄÚÄÜ£¬ÔÚˮƽ·ÃæÉÏÔÈËÙÐÐʻʱÄÜÁ¿×ª»»µÄÐÎʽÊÇ»¯Ñ§ÄÜת»¯ÎªµçÄÜÔÙת»¯Îª»úеÄÜ£¬×îºóתΪÄÚÄÜ£®

Answer 1

·ÖÎö £¨1£©µç¶¯×ÔÐгµÃ»ÓÐȼÆøÅÅ·Å£¬ÎÞÎÛȾ£»
£¨2£©µç¶¯×ÔÐгµÊÜÖØÁ¦¡¢Ö§³ÖÁ¦¡¢ÆäÓàÁ¦ºÍ×èÁ¦£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÁÐʽÇó½â¼ÓËٶȣ»
£¨3£©µç¶¯×ÔÐгµÒÔ×î´óÐÐÊ»ËÙ¶ÈÐÐʻʱ£¬¸ù¾ÝƽºâÌõ¼þµÃµ½F=f£¬¸ù¾ÝW=UItÇó½â´¢´æµÄµçÄÜ£¬¸ù¾ÝW=FsÇó½âÐÐÊ»¾àÀ룻
£¨4£©µç¶¯×ÔÐгµÔÚ³äµç¡¢·Åµçʱ£¬Éæ¼°µÄÄÜÁ¿ÓеçÄÜ¡¢»¯Ñ§ÄÜ¡¢»úеÄÜ£®

½â´ð ½â£º£¨1£©µç¶¯×ÔÐгµ±»³ÆΪÊÇ¡°ÂÌÉ«½»Í¨¹¤¾ß¡±ÒòΪÆäÏûºÄµçÄÜ£¬Ã»ÓÐÅÅ·ÅÎ
£¨2£©µç¶¯×ÔÐгµÊܵ½µÄ×èÁ¦£ºf=0.03mg=30N£»
µ±×ÔÐгµ³µËÙΪ1m/sʱ£¬×î´óÇ£ÒýÁ¦£ºF=$\frac{P}{v}=\frac{150W}{1m/s}=150N$£»
¹Ê×î´ó¼ÓËÙ¶ÈΪ£ºa=$\frac{F-f}{m}=\frac{150-30}{100}=1.2m/{s}^{2}$£»
£¨3£©µç¶¯×ÔÐгµÐîµç³ØÔÚ³äµçºóʵÑé·Åµçʱ£¬ÓÃ2AµÄµçÁ÷·Åµç£¬¿ÉÒԷŵç6h£¬¹Ê´¢´æµÄµçÄÜΪ£ºE=UIt£»
µç¶¯×ÔÐгµÒÔ×î´óÐÐÊ»ËÙ¶ÈÐÐʻʱ£¬Ç£ÒýÁ¦µÈÓÚ×èÁ¦£¬ÎªF=f=30N£»
×î´óËٶȣºv=$\frac{P}{F}=\frac{150W}{30N}=5m/s$£»
¸ù¾ÝÄÜÁ¿Êغ㶨ÂÉ£¬ÓУºE=FS£»
½âµÃ£ºS=$\frac{UIt}{F}$=$\frac{36¡Á2¡Á6¡Á3600}{30}$=51840m=51.84km£»
×ʱ¼ä£ºt=$\frac{S}{v}$=$\frac{51840m}{5m/s}$=2.88h£»
£¨4£©µç¶¯×ÔÐгµÔÚ³äµçʱ£¬ÄÜÁ¿×ª»»µÄÐÎʽÊǵçÄÜת»¯Îª»¯Ñ§ÄÜ£¬¸ßËÙÐÐÊ»¹ý³ÌÖÐÄÜÁ¿µÄת»»ÐÎʽÊÇ»¯Ñ§ÄÜת»¯ÎªµçÄÜÔÙת»¯Îª»úеÄÜ£¬×îºóתΪÄÚÄÜ£¬ÔÚˮƽ·ÃæÉÏÔÈËÙÐÐʻʱÄÜÁ¿×ª»»µÄÐÎʽÊÇ»¯Ñ§ÄÜת»¯ÎªµçÄÜÔÙת»¯Îª»úеÄÜ£¬×îºóתΪÄÚÄÜ£®
¹Ê´ð°¸Îª£º£¨1£©ÆäÏûºÄµçÄÜ£¬Ã»ÓÐÅÅ·ÅÎ£¨2£©1.2£»£¨3£©2.88£¬51.84£»£¨4£©µçÄÜת»¯Îª»¯Ñ§ÄÜ£¬»¯Ñ§ÄÜת»¯ÎªµçÄÜÔÙת»¯Îª»úеÄÜ£¬×îºóתΪÄÚÄÜ£»»¯Ñ§ÄÜת»¯ÎªµçÄÜÔÙת»¯Îª»úеÄÜ£¬×îºóתΪÄÚÄÜ£®

µãÆÀ ±¾Ìâ¹Ø¼üÊÇÃ÷È·µç¶¯×ÔÐгµµÄÄÜÁ¿×ª»¯Çé¿ö£¬Í¬Ê±ÒªÖªµÀÇ£ÒýÁ¦µÄ¹¦ÂÊP=Fv£¬ÒªÊÜÁ¦·ÖÎöºó¸ù¾ÝÄÜÁ¿Êغ㶨ÂÉÁÐʽ·ÖÎö£®