ÌâÄ¿ÄÚÈÝ

12£®ÏçÕò¾ÓÃñ½¨Â¥·¿µØÊÜÌõ¼þÏÞÖÆ£¬ÎÞ·¨Ê¹ÓÃÆðÖØ»úµõ½¨Öþ²ÄÁÏÉÏÂ¥£¬³£ÓÃÈçͼËùʾµÄ×°Öã®ÒÑ֪ÿ¸ùÉþ×ÓÄܳÐÊܵÄ×î´óÀ­Á¦Îª500N£¬¶¨»¬ÂÖµÄÖÊÁ¿Îª0.5kg£¬¶¯»¬ÂÖµÄÖÊÁ¿Îª0.6kg£¬»õÏäÖØÎª15N£¬²»¼ÆÉþÖØºÍÉþ×ÓÓ뻬ÂÖ¼äµÄĦ²Á£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©g=10N/kg£®
A£®ÔÈËÙµõÆð²ÄÁÏÉÏÂ¥£¬Ã¿´ÎÄܵõµÄ²ÄÁÏ×î¶à²»Äܳ¬¹ý1031N
B£®Ê¹Óõ͍»¬ÂÖÖÊÁ¿Ô½Ð¡£¬¸Ã×°ÖõĻúеЧÂÊÔ½¸ß
C£®¹¤ÈË¿ìËÙÀ­ÉýÓëÂýËÙÀ­ÉýͬÑùµÄ²ÄÁÏÏà±È£¬¹¤ÈË×ö¹¦µÄ¹¦ÂÊÏàͬ
D£®ÈôÖªµÀËùµõ²ÄÁÏÊܵ½µÄÖØÁ¦£¬ÔÈËÙµõÆð²ÄÁÏÉÏÉý10m£¬Ôò¿É¼ÆËãˮƽÀ­Á¦FËù×öµÄ¹¦

·ÖÎö £¨1£©ÓÉͼ֪³Ðµ£ÎïÖØµÄÉþ×Ó¹ÉÊýn=3£¬²»¼ÆÉþÖØºÍÉþ×ÓÓ뻬ÂÖ¼äµÄĦ²Á£¬À­Á¦F=$\frac{1}{3}$£¨G+GÏä+GÂÖ£©£¬ÖªµÀÿ¸ùÉþ×ÓÄܳÐÊܵÄ×î´óÀ­Á¦£¬¿ÉÇóÿ´ÎÄܵõµÄ²ÄÁÏ×î´óÖØÁ¦£»
£¨2£©Ê¹Óû¬ÂÖ×éÔö´ó»úеЧÂʵķ½·¨£ºÔö´óÌáÉýµÄÎïÖØ£¬¼õС¶¯»¬ÂÖÖØÁ¦¡¢¼õСĦ²Á£»
£¨3£©ÀûÓù«Ê½P=$\frac{W}{t}$·ÖÎöÅжϹ¤ÈË×ö¹¦µÄ¹¦ÂÊ´óС¹ØÏµ£»
£¨4£©ÖªµÀËùµõ²ÄÁÏÊܵ½µÄÖØÁ¦£¬ÀûÓÃF=$\frac{1}{3}$£¨G+GÏä+GÂÖ£©¿ÉÇóÀ­Á¦£»ÀûÓÃs=3hÇóÀ­Á¦¶ËÒÆ¶¯µÄ¾àÀ룬ÀûÓÃW=Fs¿É¼ÆËãˮƽÀ­Á¦FËù×öµÄ¹¦£®

½â´ð ½â£º
¶¯»¬ÂÖÖØÁ¦GÂÖ=mg=0.6kg¡Á10N/kg=6N£®
A¡¢ÓÉͼ֪£¬n=3£¬²»¼ÆÉþÖØºÍÉþ×ÓÓ뻬ÂÖ¼äµÄĦ²Á£¬À­Á¦F=$\frac{1}{3}$£¨G+GÏä+GÂÖ£©£¬Ã¿´ÎÄܵõµÄ²ÄÁÏ×î´óÖØG×î´ó=3F×î´ó-£¨GÏä+GÂÖ£©=3¡Á500N-£¨15N+6N£©=1479N£¬¹ÊA´í£»
B¡¢¸Ä±äʹÓõ͍»¬ÂÖµÄÖÊÁ¿£¬²»»áÓ°ÏìÓÐÓù¦¡¢×ܹ¦µÄ´óС£¬²»»áÓ°Ï컬ÂÖ×éµÄ»úеЧÂÊ£¬¹ÊB´í£»
C¡¢¹¤ÈË¿ìËÙÀ­Éý¡¢ÂýËÙÀ­ÉýͬÑùµÄ²ÄÁÏ£¬×öµÄ¹¦Ïàͬ£¬µ«Ê±¼ä²»Í¬£¬ÓÉP=$\frac{W}{t}$¿ÉÖª¹¤ÈË×ö¹¦µÄ¹¦Âʲ»Ïàͬ£¬¹ÊC´í£»
D¡¢ÖªµÀËùµõ²ÄÁÏÊܵ½µÄÖØÁ¦£¬ÀûÓÃF=$\frac{1}{3}$£¨G+GÏä+GÂÖ£©ÇóÀ­Á¦£»ÖªµÀµõÆð²ÄÁϵĸ߶ȣ¬ÀûÓÃs=3hÇóÀ­Á¦¶ËÒÆ¶¯µÄ¾àÀ룬ÀûÓÃW=Fs¿É¼ÆËãˮƽÀ­Á¦FËù×öµÄ¹¦£¬¹ÊDÕýÈ·£®
¹ÊÑ¡D£®

µãÆÀ ±¾Ì⿼²éÁËʹÓû¬ÂÖ×éÀ­Á¦¡¢×ܹ¦¡¢¹¦ÂʵļÆË㣬ÒÔ¼°Ìá¸ß»úеЧÂʵķ½·¨£¬ÖªÊ¶µã¶à¡¢×ÛºÏÐÔÇ¿£¬ÒªÇóÁé»îÓ¦ÓÃÏà¹ØÖªÊ¶£¬ÊôÓÚÄÑÌâ¡¢Ò×´íÌ⣡

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø