Á½°ë¾¶¾ùΪ60cmµÄתÅ̶̹¨ÔÚ¼ä¾à¿ÉÒÔµ÷ÕûµÄˮƽÃæÉÏ£¬×ªÅÌÔڵ綯»ú´ø¶¯Ï¾ùÒÔ5rad/s½ÇËÙ¶ÈÏòÏà·´·½Ïòת¶¯£®Ôڹ⻬µÄˮƽÃæÉÏÓÐÖÊÁ¿Îª10kg£¬³¤Îª2mµÄÖ±°å£¬´Ó¾²Ö¹¿ªÊ¼ÔÚתÅÌ×÷ÓÃÏÂÏòÇ°Ô˶¯£®ÒÑÖªÖ±°åÓëתÅ̼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.2£¬×ªÅ̶Ôľ°åµÄ´¹Ö±Ñ¹Á¦Îª50N£¬g=10m/s2£®Çó
£¨1£©×ªÅ̱ßÔµµÄÏßËÙ¶È
£¨2£©Ö±°å´©¹ýתÅ̵Äʱ¼ä
£¨3£©Ö±°å¸úתÅ̽Ӵ¥¹ý³ÌÖУ¬Á½×ªÅ̶Ôľ°å×öµÄ¹¦£®

½â£º£¨1£©R=60cm=0.6m
¦Ø=5rad/s
v=¦ØR=3m/s
¹ÊתÅ̱ßÔµµÄÏßËÙ¶ÈΪ3m/s
£¨2£©Ö±°å´©¹ýתÅ̵ÄÔ˶¯¿ÉÄÜÊÇÏȼÓËÙºóÔÈËÙÁ½¸ö¹ý³Ì£¬Ò²¿ÉÄÜÊÇÒ»Ö±ÔȼÓËÙÖ±ÏßÔ˶¯£¬¼ÓËÙ¹ý³ÌÖУ¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉ£¬ÓÐ
2f=2¦ÌN=ma
ÓÉv=at£¬Èç¹û×îÖÕÖ±°åËٶȸúתÅ̱ßÔµÏßËÙ¶ÈÒ»Ñù
Ôò¿ÉÖªµÀt=1.5s

ÒòΪֱ°å³¤L£¼S£¬ËùÒÔÖ±°åÒ»Ö±×öÔȼÓËÙÔ˶¯×ß¹ýL£©
ÓÉ Ôò
¹ÊÖ±°å´©¹ýתÅ̵Äʱ¼äΪs£®
£¨3£©¸ù¾Ý¹¦µÄ¶¨Ò壬ÓÐ
W=2fL=40J
¹ÊÖ±°å¸úתÅ̽Ӵ¥¹ý³ÌÖУ¬Á½×ªÅ̶Ôľ°å×öµÄ¹¦Îª40J£®
·ÖÎö£º£¨1£©¸ù¾ÝÏßËÙ¶ÈÓë½ÇËٶȵĹØϵ¹«Ê½v=¦ØrÁÐʽÇó½â£»
£¨2£©Ö±°åÏȼÓËÙ£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÇó½â³ö¼ÓËٶȣ¬ÏȼÙÉèÖ±°å×ã¹»³¤£¬¸ù¾ÝÔ˶¯Ñ§¹«Ê½¼ÆËã³öÖ±°å¼ÓËٵľàÀ룬´Ó¶øÅжÏÖ±°åÊÇÒ»Ö±¼ÓËÙ£¬¸ù¾ÝÔ˶¯Ñ§¹«Ê½Çóʱ¼ä£»
£¨3£©×ªÅ̶ÔÖ±°åµÄĦ²ÁÁ¦×ö¹¦£¬¸ù¾Ý¹¦µÄ¶¨ÒåÖ±½ÓÇó½â£®
µãÆÀ£º±¾Ìâ¹Ø¼üÏȶÔÖ±°åÊÜÁ¦·ÖÎöºó£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÈ·¶¨ÎïÌåµÄ¼ÓËٶȣ¬È»ºó½áºÏÔ˶¯Ñ§¹«Ê½Çó½â£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

¾«Ó¢¼Ò½ÌÍøÁ½°ë¾¶¾ùΪ60cmµÄתÅ̶̹¨ÔÚ¼ä¾à¿ÉÒÔµ÷ÕûµÄˮƽÃæÉÏ£¬×ªÅÌÔڵ綯»ú´ø¶¯Ï¾ùÒÔ5rad/s½ÇËÙ¶ÈÏòÏà·´·½Ïòת¶¯£®Ôڹ⻬µÄˮƽÃæÉÏÓÐÖÊÁ¿Îª10kg£¬³¤Îª2mµÄÖ±°å£¬´Ó¾²Ö¹¿ªÊ¼ÔÚתÅÌ×÷ÓÃÏÂÏòÇ°Ô˶¯£®ÒÑÖªÖ±°åÓëתÅ̼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.2£¬×ªÅ̶Ôľ°åµÄ´¹Ö±Ñ¹Á¦Îª50N£¬g=10m/s2£®Çó
£¨1£©×ªÅ̱ßÔµµÄÏßËÙ¶È
£¨2£©Ö±°å´©¹ýתÅ̵Äʱ¼ä
£¨3£©Ö±°å¸úתÅ̽Ӵ¥¹ý³ÌÖУ¬Á½×ªÅ̶Ôľ°å×öµÄ¹¦£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£ºÑγÇÄ£Äâ ÌâÐÍ£ºÎÊ´ðÌâ

Á½°ë¾¶¾ùΪ60cmµÄתÅ̶̹¨ÔÚ¼ä¾à¿ÉÒÔµ÷ÕûµÄˮƽÃæÉÏ£¬×ªÅÌÔڵ綯»ú´ø¶¯Ï¾ùÒÔ5rad/s½ÇËÙ¶ÈÏòÏà·´·½Ïòת¶¯£®Ôڹ⻬µÄˮƽÃæÉÏÓÐÖÊÁ¿Îª10kg£¬³¤Îª2mµÄÖ±°å£¬´Ó¾²Ö¹¿ªÊ¼ÔÚתÅÌ×÷ÓÃÏÂÏòÇ°Ô˶¯£®ÒÑÖªÖ±°åÓëתÅ̼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.2£¬×ªÅ̶Ôľ°åµÄ´¹Ö±Ñ¹Á¦Îª50N£¬g=10m/s2£®Çó
£¨1£©×ªÅ̱ßÔµµÄÏßËÙ¶È
£¨2£©Ö±°å´©¹ýתÅ̵Äʱ¼ä
£¨3£©Ö±°å¸úתÅ̽Ӵ¥¹ý³ÌÖУ¬Á½×ªÅ̶Ôľ°å×öµÄ¹¦£®
¾«Ó¢¼Ò½ÌÍø

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨15·Ö£©Á½°ë¾¶¾ùΪ60cmµÄתÅ̶̹¨ÔÚ¼ä¾à¿ÉÒÔµ÷ÕûµÄˮƽÃæÉÏ£¬×ªÅÌÔڵ綯»ú´ø¶¯Ï¾ùÒÔ5rad/s½ÇËÙ¶ÈÏòÏà·´·½Ïòת¶¯¡£Ôڹ⻬µÄˮƽÃæÉÏÓÐÖÊÁ¿Îª10kg£¬³¤Îª2mµÄÖ±°å´Ó¾²Ö¹¿ªÊ¼ÔÚתÅÌ×÷ÓÃÏÂÏòÇ°Ô˶¯¡£ÒÑÖªÖ±°åÓëתÅ̼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.2£¬×ªÅ̶Ôľ°åµÄ´¹Ö±Ñ¹Á¦Îª50N£¬g=10m/s¡£Çó

£¨1£©×ªÅ̱ßÔµµÄÏßËÙ¶È

£¨2£©Ö±°å´©¹ýתÅ̵Äʱ¼ä

£¨3£©Ö±°å¸úתÅ̽Ӵ¥¹ý³ÌÖУ¬Á½×ªÅ̶Ôľ°å×öµÄ¹¦

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2011Äê½­ËÕÊ¡ÑγÇÊи߿¼ÎïÀíÃþµ×ÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£º½â´ðÌâ

Á½°ë¾¶¾ùΪ60cmµÄתÅ̶̹¨ÔÚ¼ä¾à¿ÉÒÔµ÷ÕûµÄˮƽÃæÉÏ£¬×ªÅÌÔڵ綯»ú´ø¶¯Ï¾ùÒÔ5rad/s½ÇËÙ¶ÈÏòÏà·´·½Ïòת¶¯£®Ôڹ⻬µÄˮƽÃæÉÏÓÐÖÊÁ¿Îª10kg£¬³¤Îª2mµÄÖ±°å£¬´Ó¾²Ö¹¿ªÊ¼ÔÚתÅÌ×÷ÓÃÏÂÏòÇ°Ô˶¯£®ÒÑÖªÖ±°åÓëתÅ̼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.2£¬×ªÅ̶Ôľ°åµÄ´¹Ö±Ñ¹Á¦Îª50N£¬g=10m/s2£®Çó
£¨1£©×ªÅ̱ßÔµµÄÏßËÙ¶È
£¨2£©Ö±°å´©¹ýתÅ̵Äʱ¼ä
£¨3£©Ö±°å¸úתÅ̽Ӵ¥¹ý³ÌÖУ¬Á½×ªÅ̶Ôľ°å×öµÄ¹¦£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸