Question

СÇò´Ó¸ß´¦ÏÂÂäµ½ÊúÖ±·ÅÖõĵ¯»ÉÉÏ£¨Èçͼ¼×£¬µ¯»ÉÖÊÁ¿¿É²»¼Æ£©£¬ÔÚ¸Õ½Ó´¥µ¯»ÉµÄ˲¼ä£¨ÈçͼÒÒ£©£¬ËÙ¶ÈΪ5m/s£®ÔÚµ¯»É±»Ñ¹Ëõ£¨Èçͼ±û£©µÄÕû¸ö¹ý³ÌÖУ¬Ð¡ÇòµÄËÙ¶ÈvºÍµ¯»ÉËõ¶ÌµÄ³¤¶È¡÷LÖ®¼äµÄ¹ØϵÈçͼ¶¡Ëùʾ£¬ÆäÖÐAΪÇúÏßµÄ×î¸ßµã£®ÒÑÖª¸Ãµ¯»ÉÿÊܵ½0.2NµÄѹÁ¦¾ÍËõ¶Ì1cm£¬²¢ÇÒµ¯»ÉµÄÐαäʼÖÕÊǵ¯ÐÔÐα䣮

£¨1£©ÔÚСÇò¸Õ¿ªÊ¼×²»÷µ¯»Éµ½µ¯»É±»Ñ¹Ëõµ½×î¶ÌµÄ¹ý³ÌÖУ¬Ð¡ÇòµÄËٶȱ仯Çé¿öÊÇ

Ïȱä´óºó±äС

£¬·¢ÉúÐαäµÄµ¯»ÉÒò´Ë¶ø¾ßÓÐ

µ¯ÐÔÊÆ

ÄÜ£®
£¨2£©Ð¡ÇòÔÚËÙ¶È×î´óʱÊܵ½µÄµ¯Á¦ÓëÖØÁ¦ÊÇÒ»¶Ô

ƽºâÁ¦

£¬Ð¡ÇòÊܵ½µÄÖØÁ¦Îª

1

N£¨²»¿¼ÂÇ¿ÕÆø×èÁ¦£©£®
£¨3£©µ¯»ÉµÄ×î´óѹËõÁ¿ÊÇ

0.407

m£¬ÕâʱµÄСÇòËùÊܵ¯»Éµ¯Á¦ÊÇ

8.14

N£®

Answer 1

·ÖÎö£º1¡¢ÓÉͼÏó¿ÉÖª£¬Ð¡ÇòËÙ¶ÈÏȱä´ó£¬ºó±äС£®µ¯»É·¢ÉúÐαä´Ó¶ø¾ßÓе¯ÐÔÊÆÄÜ£®
2¡¢ÔÚÔ˶¯¹ý³ÌÖÐСÇòÊÜÖØÁ¦Ó뵯»ÉµÄµ¯Á¦£¬µ±Á½Á¦´óСÏàµÈʱ£¬Ð¡ÇòËÙ¶È×î´ó£¬´Ëʱµ¯Á¦ÓëÖØÁ¦ÊÇÒ»¶ÔƽºâÁ¦£®
3¡¢ÓÉͼÏó×ø±ê¿ÉÖ±½ÓÇóµÃµ¯»ÉµÄѹËõÁ¿Ó뵯Á¦£®

½â´ð£º½â£º£¨1£©ÓÉͼÏó¿´³ö£ºÔÚСÇò¸Õ¿ªÊ¼×²»÷µ¯»Éµ½µ¯»É±»Ñ¹Ëõµ½×î¶ÌµÄ¹ý³ÌÖУ¬Ð¡ÇòËÙ¶ÈÏȱä´óºó±äС£®ÔÚСÇòÏòÏÂÔ˶¯µÄ¹ý³ÌÖУ¬
µ¯»É·¢ÉúÐα䣬µ¯»ÉÓÉÓÚÐαä¶ø¾ßÓе¯ÐÔÊÆÄÜ£®
£¨2£©ÔÚСÇòÏòÏÂÔ˶¯¹ý³ÌÖУ¬ÊÜÊúÖ±ÏòÉϵĵ¯»ÉµÄµ¯Á¦£¬ÊúÖ±ÏòϵÄÖØÁ¦£®¿ªÊ¼Ê±£¬ÖØÁ¦´óÓÚµ¯Á¦£¬ºÏÁ¦ÏòÏ£¬Ð¡ÇòËÙ¶ÈÔ½À´Ô½´ó£®
Ë浯»ÉѹËõÁ¿µÄÔö´ó£¬µ¯Á¦Ô½À´Ô½´ó£¬µ±µ¯Á¦ÓëÖØÁ¦ÏàµÈʱ£¬Á½Á¦ÊÇÒ»¶ÔƽºâÁ¦£¬ºÏÁ¦ÎªÁ㣮СÇòÔÙÏòÏÂÔ˶¯£¬µ¯Á¦´óÓÚÖØÁ¦£¬
ºÏÁ¦ÏòÏ£¬Ð¡ÇòËٶȼõС£®Óɴ˿ɼû£¬µ±ÖØÁ¦GÓ뵯Á¦FÊÇÒ»¶ÔƽºâÁ¦Ê±£¬Ð¡ÇòËÙ¶È×î´ó£®´Ëʱ£¬ÓÉͼ¿ÉÖªµ¯»ÉµÄѹËõÁ¿¡÷L=5cm£¬
ÓÉƽºâÌõ¼þµÃ£»G=F=0.2N/cm¡Á5cm=1N£®
£¨3£©ÓÉͼ¿ÉÖª£¬µ±Ð¡ÇòËÙ¶ÈΪÁãʱ£¬µ¯»ÉµÄѹËõÁ¿×î´óΪL=40.7cm=0.407m£¬´ËʱСÇòËùÊܵ¯»ÉµÄµ¯Á¦Fµ¯=0.2N/cm¡Á40.7cm=8.14N£®
¹Ê´ð°¸Îª£º£¨1£©Ïȱä´óºó±äС  µ¯ÐÔÊÆ£®£¨2£©Æ½ºâÁ¦   1£®£¨3£©0.407   8.14£®

µãÆÀ£º½âÌâµÄ¹Ø¼ü£¨1£©¶Á¶®Í¼£¬ÓÉͼ»ñÈ¡µ¯»ÉѹËõÁ¿£¬Ð¡ÇòËٶȱ仯µÄÐÅÏ¢£®£¨2£©·ÖÎöСÇòµÄÔ˶¯¹ý³Ì£¬·ÖÎöµ¯Á¦µÄ±ä»¯Çé¿ö£®