·ÖÎö ±¾ÌâÖпªÊ¼Ð¡Ä¾¿éÊܵ½ÏòºóµÄĦ²ÁÁ¦£¬×öÔȼõËÙÔ˶¯£¬³¤Ä¾°åÊܵ½ÏòÇ°µÄĦ²ÁÁ¦×öÔȼÓËÙÔ˶¯£»µ±³¤Ä¾°å·´µ¯ºó£¬Ð¡Ä¾¿é¼ÌÐøÔȼõËÙÇ°½ø£¬³¤Ä¾°åÔȼõËÙÏò×óÔ˶¯£¬Ò»Ö±»Øµ½ÔÀ´Î»Öòž²Ö¹£»Ö®ºó³¤Ä¾°åÔÙ´ÎÏòÓÒ¼ÓËÙÔ˶¯£¬Ð¡Ä¾¿é»¹ÊÇÔȼõËÙÔ˶¯£»³¤Ä¾°åÔ˶¯¾ßÓÐÖظ´ÐÔ£¬ÓÉÓÚľ°å³¤¶È¿É±£Ö¤Îï¿éÔÚÔ˶¯¹ý³ÌÖв»Óëǽ½Ó´¥£¬¹ÊÖ±µ½Á½ÕßËÙ¶ÈÏàͬ£¬Ò»ÆðÓëǽ±ÚÅöײºó·´µ¯£»Ö®ºó³¤Ä¾°åÏò×ó¼õËÙ£¬Ð¡Ä¾¿éÏòÓÒ¼õËÙ£¬Á½ÕßËÙ¶ÈÒ»Æð¼õΪÁ㣮
½â´ð ½â£º£¨1£©Îï¿é»¬ÉÏľ°åºó£¬ÔÚĦ²ÁÁ¦×÷ÓÃÏ£¬Ä¾°å´Ó¾²Ö¹¿ªÊ¼×öÔȼÓËÙÔ˶¯£®Éèľ°å¼ÓËٶȴóСΪa£¬¾Àúʱ¼äTºóÓëǽµÚÒ»´ÎÅöײ£¬ÅöײʱµÄËٶȴóСΪv1£¬Ôò£º
¦Ìmg=ma£¬
L=$\frac{1}{2}a{T^2}$£¬
v1=aT£¬
ÁªÁ¢½âµÃ£ºT=0.4s£¬v1=0.4m/s
£¨2£©ÔÚÎï¿éÓëľ°åÁ½Õß´ïµ½¹²Í¬ËÙ¶ÈÇ°£¬ÔÚÿÁ½´ÎÅöײ֮¼ä£¬Ä¾°åÊܵ½Îï¿é¶ÔËüµÄĦ²ÁÁ¦×÷Óöø×ö¼ÓËٶȺ㶨µÄÔȼõÖ±ÏßÔ˶¯£¬Òò¶øľ°åÓëǽÏàÅöºó½«·µ»ØÖÁ³õλÖÃÇÒËٶȼõΪÁ㣬ËùÓÃʱ¼äҲΪT£®Îï¿éÓëľ°åµÄÖÊÁ¿ÏàµÈ£¬¼ÓËٶȴóСÏàµÈ£®ÉèÔÚÎï¿éÓëľ°åÁ½Õß´ïµ½¹²Í¬ËÙ¶Èvǰľ°å¹²¾Àún´ÎÅöײ£¬ÔòÓУº
v=v0-£¨2nT+¡÷t£©a=a¡÷t£¬
ʽÖС÷tÊÇÅöײn´Îºóľ°å´Ó³õʼλÖÃÖÁ´ïµ½¹²Í¬ËÙ¶ÈʱËùÐèÒªµÄʱ¼ä£¬µÃ£º2v=v0-2nTa£¬
ÓÉÓÚľ°åµÄËÙÂÊÖ»ÄÜλÓÚ0µ½v1Ö®¼ä£¬¹ÊÓУº0¡Üv0-2nTa¡Ü2v1
Çó½âÉÏʽµÃ£º1.5¡Ün¡Ü2.5£¬
ÓÉÓÚnÊÇÕûÊý£¬¹Ên=2£¬v=0.2m/s£¬¡÷t=0.2s£¬
´Ó¿ªÊ¼µ½Îï¿éÓëľ°å´ïµ½¹²Í¬ËÙ¶ÈËùÓõÄʱ¼äΪ£ºt=4T+¡÷t=1.8s£¬
¼´´ÓÎï¿é»¬ÉÏľ°åµ½Á½Õß´ïµ½¹²Í¬ËÙ¶Èʱ£¬Ä¾°åÓëǽ¹²·¢ÉúÁ½´ÎÅöײ£¬ËùÓõÄʱ¼äΪ1.8s£®
£¨3£©Îï¿éÓëľ°å´ïµ½¹²Í¬ËÙ¶Èʱ£¬Ä¾°åÓëǽ֮¼äµÄ¾àÀëΪ£º$s=L-\frac{1}{2}a{£¨¡÷t£©^2}$£¬
´úÈëÊý¾Ý½âµÃ£ºs=0.06m£¬¼´´ïµ½¹²Í¬ËÙ¶Èʱľ°åÓÒ¶ËÓëǽ֮¼äµÄ¾àÀëΪ0.06m£®
´ð£º£¨1£©Ä¾°åµÚÒ»´ÎÓëǽÅöײʱµÄËÙ¶ÈΪ0.4m/s£»
£¨2£©´ÓСÎï¿é»¬ÉÏľ°åµ½¶þÕß´ïµ½¹²Í¬ËÙ¶Èʱ£¬Ä¾°åÓëǽÅöײµÄ×Ü´ÎÊýΪ2´Î£¬ËùÓõÄʱ¼äΪ1.8s£»
£¨3£©´ïµ½¹²Í¬ËÙ¶Èʱľ°åÓÒ¶ËÓëǽ֮¼äµÄ¾àÀëΪ0.06m£®
µãÆÀ ±¾Ìâ¹Ø¼üÒª·ÖÇå³ö³¤Ä¾°åµÄÔ˶¯ÎªÍù¸´Ô˶¯£¬¾ßÓÐÖظ´ÐÔ£¬¶øСľ¿éµÄÔ˶¯ÊÇÔȼõËÙÖ±ÏßÔ˶¯£¬È»ºó¸ù¾ÝÔ˶¯Ñ§¹«Ê½ÁÐʽÇó½â£®
Ä꼶 | ¸ßÖÐ¿Î³Ì | Ä꼶 | ³õÖÐ¿Î³Ì |
¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ |
¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍƼö£¡ |
¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍƼö£¡ |
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
A£® | ¾¹ýaµãʱ£¬È˵ÄËÙ¶È×î´ó | B£® | ¾¹ýbµãʱ£¬È˵ÄËÙ¶È×î´ó | ||
C£® | ´Óaµãµ½bµã£¬È˵ļÓËÙ¶ÈÔÚÔö´ó | D£® | ´Óbµãµ½cµã£¬È˵ļÓËÙ¶ÈÔÚÔö´ó |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | ¸ù¾Ý¿âÂض¨Âɹ«Ê½F=$\frac{k{q}_{1}{q}_{2}}{{r}^{2}}$¿ÉÖª£¬Á½¸öµçºÉµÄ¾àÀëÇ÷ÓÚÁãʱ£¬¿âÂØÁ¦ÎªÎÞÇî´ó | |
B£® | ¸ù¾ÝµçºÉÊغ㶨ÂÉ¿ÉÖª£¬Ò»¸öÓëÍâ½çûÓеçºÉ½»»»µÄϵͳ£¬µçºÉµÄ´úÊýºÍ²»±ä | |
C£® | ÓÉU=Ed¿ÉÖª£¬ÔÈÇ¿µç³¡ÖÐÈÎÒâÁ½µã¼äµÄµçÊƲîÓëÕâÁ½µã¼äµÄ¾àÀë³ÉÕý±È | |
D£® | ¸ù¾ÝC=$\frac{Q}{U}$¿ÉÖª£¬µçÈÝÆ÷µÄµçÈÝÓëÆäµçºÉÁ¿³ÉÕý±È£¬ÓëÁ½¼«°åµÄµçÊƲî³É·´±È |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
A£® | С»¬¿éAµÄÖÊÁ¿Îª4kg | |
B£® | ľ°åBµÄÖÊÁ¿Îª5kg | |
C£® | µ±F=40Nʱ£¬Ä¾°åBµÄ¼ÓËÙ¶ÈΪ3m/s2 | |
D£® | С»¬¿éAÓëľ°åB¼äµÄ×î´ó¾²Ä¦éßÁ¦Îª12N |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑéÌâ
´ú±í·ûºÅ | L0 | Lx | L1 | L2 | L3 | L4 | L5 | L6 |
ÊýÖµ£¨cm£© | 25.35 | 27.35 | 29.35 | 31.30 | 33.4 | 35.35 | 37.40 | 39.30 |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | Îï¿éAÏà¶ÔÓÚС³µÏòÓÒ»¬¶¯ | B£® | Îï¿éAÊܵ½µÄĦ²ÁÁ¦´óС±äΪ2N | ||
C£® | Îï¿éAÊܵ½µÄĦ²ÁÁ¦·½Ïò²»±ä | D£® | Îï¿éAÊܵ½µ¯»ÉµÄÀÁ¦½«Ôö´ó |
²é¿´´ð°¸ºÍ½âÎö>>
°Ù¶ÈÖÂÐÅ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com