ÑéÖ¤¡°»úеÄÜÊغ㶨ÂÉ¡±µÄʵÑé²ÉÓÃÖØÎï×ÔÓÉÏÂÂäµÄ·½·¨£®
£¨1£©ÓÐÏÂÁÐÆ÷²Ä¿É¹©Ñ¡Ôñ£ºµç´Å´òµã¼ÆʱÆ÷¡¢Ìú¼Ų̈£¨´øÌú¼Ü£©¡¢´øÌú¼ÐµÄÖØÎï¡¢¸´Ð´Ö½¡¢Ö½´ø¡¢Ãë±í¡¢µ¼Ïß¡¢¿ª¹Ø¡¢Ììƽ£¬
ÆäÖв»±ØÒªµÄÆ÷²ÄÊÇ                                   £»
ȱÉÙµÄÆ÷²ÄÊÇ                                        ¡£
£¨2£©ÒÑÖªËùÓõç»ð»¨´òµã¼ÆʱÆ÷Ëù½ÓµçÔ´µÄƵÂÊΪ50Hz£¬²éµÃµ±µØµÄÖØÁ¦¼ÓËÙ¶ÈΪg£½9.80m£¯s2£¬ÖØÎïÖÊÁ¿Îª0.5kg£¬Ä³Í¬Ñ§Ñ¡ÔñÁËÒ»ÌõÀíÏëµÄÖ½´ø£¬Óÿ̶ȳ߲âÁ¿¸÷¼Æʱµã¶ÔÓ¦¿Ì¶È³ßµÄ¶ÁÊýÈçͼËùʾ£®Í¼ÖÐOµãÊÇ´òµã¼ÆʱÆ÷´ò³öµÄµÚÒ»¸öµã£¨´ËʱÖØÎïµÄËÙ¶ÈΪÁ㣩£¬A¡¢B¡¢C¡¢D·Ö±ðÊÇÁ¬Ðø´ò³öµÄ¼Æʱµã£®ÖØÎïÓÉOµãÔ˶¯µ½Cµãʱ£¬ÖØÎïµÄÖØÁ¦ÊÆÄܵļõÉÙÁ¿¡÷EP =      J£¬´Ë¹ý³ÌÖÐÎïÌ嶯ÄܵÄÔö¼ÓÁ¿¡÷Ek =      J.£¨½á¹û¾ù±£ÁôÈýλÓÐЧÊý×Ö£©

£¨3£©¿ÉµÃ³öµÄ½áÂÛÊÇ                                      ¡£
£¨4£©¸ù¾ÝÖ½´øËã³öÏà¹Ø¸÷µãµÄËÙ¶Èv£¬Á¿³öÏÂÂä¾àÀëh£¬ÔòÒÔv2/2Ϊ×ÝÖᣬÒÔhΪºáÖá»­³öµÄͼÏóÓ¦ÊÇÏÂͼÖеģ¨         £©

£¨1£©Ãë±í¡¢Ììƽ£»         µÍѹ½»Á÷µçÔ´¡¢¿Ì¶È³ß£»
£¨2£©1.60        1.56
£¨3£©ÔÚºöÂÔ×èÁ¦µÄÇé¿öÏ£¬ÖØ´¸»úеÄÜÊغ㣻
£¨4£©C

½âÎö

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

¾«Ó¢¼Ò½ÌÍøÔÚÓôòµã¼ÆʱÆ÷ÑéÖ¤»úеÄÜÊغ㶨ÂɵÄʵÑéÖУ¬Ê¹ÖÊÁ¿Îªm=1kgµÄÖØÎï×ÔÓÉÏÂÂ䣬´òµã¼ÆʱÆ÷ÔÚÖ½´øÉÏ´ò³öһϵÁеĵ㣬ѡȡһÌõ·ûºÏʵÑéÒªÇóµÄÖ½´øÈçͼËùʾ£®OΪµÚÒ»¸öµã£¬A¡¢B¡¢CΪ´ÓºÏÊÊλÖÿªÊ¼Ñ¡È¡µÄÈý¸öÁ¬Ðøµã£¨ÆäËûµãδ»­³ö£©£®ÒÑÖª´òµã¼ÆʱÆ÷ÿ¸ô0.02s´òÒ»µã£¬µ±µØµÄÖØÁ¦¼ÓËÙ¶ÈΪg=9.80m/s2£®ÄÇô£º
£¨1£©Ö½´øµÄ
 
¶Ë£¨Ìî¡°×ó¡±»ò¡°ÓÒ¡±£©ÓëÖØÎïÏàÁ¬£»
£¨2£©¸ù¾ÝͼÖÐËùµÃµÄÊý¾Ý£¬Ó¦È¡Í¼ÖÐOµãµ½
 
µãÀ´ÑéÖ¤»úеÄÜÊغ㶨ÂÉ£»
£¨3£©´ÓOµãµ½£¨2£©ÎÊÖÐËùÈ¡µÄµã£¬Ôò¼Ç¼Bµãʱ£¬ÖØÎïËÙ¶ÈvB=
 
 m/s£®ÖØÎïÖØÁ¦ÊÆÄܵļõÉÙÁ¿¡÷Ep=
 
J£¬¶¯ÄÜÔö¼ÓÁ¿¡÷Ek=
 
J£¨½á¹û±£Áô3λÓÐЧÊý×Ö£©£¬Óɴ˿ɵóö½áÂÛÊÇ
 
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÔÚÀûÓÃ×ÔÓÉÂäÌå·¨ÑéÖ¤»úеÄÜÊغ㶨ÂɵÄʵÑéÖУº
£¨1£©ÏÂÃæÁоÙÁ˸ÃʵÑéµÄ¼¸¸ö²Ù×÷²½Ö裬²»Ç¡µ±µÄ²Ù×÷ÊÇ
 
£®¾«Ó¢¼Ò½ÌÍø
A£®°´ÕÕͼʾµÄ×°Öð²×°Æ÷¼þ
B£®½«´òµã¼ÆʱÆ÷½Óµ½µçÔ´µÄ¡°Ö±Á÷Êä³ö¡±ÉÏ
C£®ÊÍ·ÅÐü¹ÒÖ½´øµÄ¼Ð×Óºó£¬ÔÙ½ÓͨµçÔ´¿ª¹Ø´ò³öÒ»ÌõÖ½´ø£¬Öظ´¼¸´Î
D£®Ñ¡ÔñÒ»ÌõÀíÏëµÄÖ½´ø£¬¶ÔÆä½øÐвâÁ¿
E£®¸ù¾Ý²âÁ¿µÄ½á¹û£¬ÑéÖ¤ghÓë
12
v2ÊÇ·ñÏàµÈ
£¨2£©´Ó´ò³öµÄ¼¸ÌõÖ½´øÖÐÌôÑ¡×îÀíÏëµÄÖ½´øµÄÒªÇóÊÇ
 
£¬ÈôijС×é´ò³öÒ»ÌõÖ½´ø£¬²âµÃÇ°Á½¸öµã¼äµÄ¾àÀëΪ4.0mm£¬ËµÃ÷¸ÃС×é²Ù×÷¹ý³Ì´æÔÚ´íÎ󣬴íÎóÔ­Òò¿ÉÄÜÊÇ
 
£®
£¨3£©ÈçͼËùʾÊÇʵÑéÖвâµÃµÄÒ»ÌõÖ½´ø£¬¸÷µã¾àOµãµÄ¾àÀë·Ö±ðΪd1£¬d2£¬d3£¬¡­£¬¸÷ÏàÁÚµã¼äµÄʱ¼ä¼ä¸ôΪT£¬µ±µØÖØÁ¦¼ÓËÙ¶ÈΪg£¬ÔòBµãµÄËٶȱí´ïʽΪvB=
 
£®ÈôBµãºÍDµãµÄËÙ¶ÈvB¡¢vDΪÒÑÖªÁ¿£¬ÒªÑéÖ¤ÎïÌå´ÓBµ½DµÄ¹ý³ÌÖлúеÄÜÊÇ·ñÊغ㣬ÔòÐèÂú×ã
 
¹Øϵ£¬ÎïÌåµÄ»úеÄÜÊغã
£¨4£©ÓÉÕâÌõÖ½´ø»¹¿ÉÒÔÑо¿¸ÃÖØÎïÏÂÂä¹ý³ÌµÄ¼ÓËٶȣ¬Çëд³ö¼ÆËã¼ÓËٶȵıí´ïʽ
 
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÔĶÁÀí½â

£¨1£©ÓöàÓõç±í¿ÉÒÔ²âÁ¿µçÁ÷¡¢µçѹºÍµç×裮
ijͬѧÓöàÓõç±íµÄ¡°V¡±µ²²âÁ¿¼ÒÍ¥µç·µÄµçѹ£¬Ê¾ÊýÈçͼ1Ëùʾ£¬Ôò´ËʱµçѹµÄ²âÁ¿ÖµÎª
 
V£®
¸ÃͬѧÓöàÓõç±í¡°¦¸¡±µ²²âÁ¿µç×è×èֵʱ£¬ÏÈÑ¡ºÃ±¶Âʵ²Î»ºó£¬ÔÙÓñí±ÊÁ¬½Ó´ý²âµç×è½øÐжÁÊý£¬ÔòÔÚËûµÄ²âÁ¿¹ý³ÌÖÐȱÉٵIJ½ÖèÊÇ
 
£®Èô°´ÕýÈ·²½Öè½øÐвâÁ¿£¬±íÅ̵ÄʾÊýÈçͼ2Ëùʾ£¬Ôò¸Ãµç×è×èÖµµÄ²âÁ¿ÖµÊÇ
 
¦¸£®
¾«Ó¢¼Ò½ÌÍø
£¨2£©ÔÚ¡°ÑéÖ¤»úеÄÜÊغ㶨ÂÉ¡±µÄʵÑéÖУ¬ÀûÓÃÖØ´¸ÍÏ×ÅÖ½´ø×ÔÓÉÏÂÂ䣬ͨ¹ý´òµã¼ÆʱÆ÷²¢´ò³öһϵÁеĵ㣬¶ÔÖ½´øÉϵĵ㼣½øÐвâÁ¿£¬¼´¿ÉÑéÖ¤»úеÄÜÊغ㶨ÂÉ£®
¢ÙÔÚʵÑé¹ý³ÌÖУ¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£º
 
£®
A£®±ØÐëʹÓõIJâÁ¿ÒÇÆ÷ÓУº´òµã¼ÆʱÆ÷¡¢ÌìƽºÍ¿Ì¶È³ß
B£®´òµã¼ÆʱÆ÷µÄÁ½¸öÏÞλ¿×ÒªÔÚͬһÊúÖ±ÏßÉÏ
C£®ÊµÑéÖÐÆäËûÌõ¼þÏàͬʱ£¬Ñ¡ÓÃÖØ´¸ÖÊÁ¿µÄ´óС²»Ó°ÏìʵÑéµÄÎó²î
D£®Ñ¡ÓÃÖ½´øÉÏÈÎÒâÁ½µãµÄÊý¾Ý¶¼¿ÉÒÔÑéÖ¤»úеÄÜÊغ㶨ÂÉ
¢Ú°´Í¼3Ëùʾ°²×°ºÃʵÑé×°Öã¬ÕýÈ·½øÐÐʵÑé²Ù×÷£¬´Ó´ò³öµÄÖ½´øÖÐÑ¡³ö·ûºÏÒªÇóµÄÖ½´ø£¬Èçͼ4Ëùʾ£®Í¼ÖÐOµãΪ´òµãÆðʼµã£¬ÇÒËÙ¶ÈΪÁ㣮ѡȡֽ´øÉÏ´ò³öµÄÁ¬ÐøµãA¡¢B¡¢C¡¢¡­£¬²â³öÆäÖÐE¡¢F¡¢Gµã¾à´òµãÆðʼµãOµÄ¾àÀë·ÖËäΪh1¡¢h2¡¢h3£¬ÒÑÖªÖØ´¸ÖÊÁ¿Îªm£¬µ±µØÖØÁ¦¼ÓËÙ¶ÈΪg£¬´òµã¼ÆʱÆ÷´òµãÖÜÆÚΪT£®ÎªÄÑ´ËʵÑé¹ý³ÌÖлúеÄÜÊÇ·ñÊغ㣬ÐèÒª¼ÆËã³ö´Ó´òÏÂOµãµ½´òÏÂFµãµÄ¹ý³ÌÖУ¬ÖØ´¸ÖØÁ¦ÈÈÄܵļõÉÙÁ¿¡÷EP=
 
£¬¶¯ÄܵÄÔö¼ÓÁ¿¡÷EK=
 
£¨ÓÃÌâÖÐËù¸ø×Öĸ±íʾ£©£®
¢ÛÒÔ¸÷µãµ½ÆðʼµãµÄ¾àÀëhΪºá×ø±ê£¬ÒÔ¸÷µãËٶȵÄƽ·½v2Ϊ×Ý×ø±ê½¨Á¢Ö±½Ç×ø±êϵ£¬ÓÃʵÑé²âµÃµÄÊý¾Ý»æ³öv2-hͼÏߣ¬Èçͼ5Ëùʾ£®´Óv2-hͼÏßÇóµÃÖØ´¸ÏÂÂäµÄ¼ÓËÙ¶Èg¡ä=
 
m/s2£®£¨±£Áô3λÓÐЧÊý×Ö£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨1£©ÔÚ¡¶ÑéÖ¤»úеÄÜÊغ㶨ÂÉ¡·µÄʵÑéÖУ¬´òµã¼ÆʱÆ÷ËùÓõçԴΪ50Hz£¬µ±µØÖØÁ¦¼ÓËٶȵÄֵΪ9.80m/s2£¬²âµÃËùÓÃÖØÎïµÄÖÊÁ¿Îª1.00kg£¬¼×¡¢ÒÒ¡¢±ûÈýѧÉú·Ö±ðÓÃͬһװÖôò³öÈýÌõÖ½´ø£¬Á¿³ö¸÷Ö½´øÉϵÚ1¡¢2Á½µã¼äµÄ¾àÀë·Ö±ðΪ0.18cm¡¢0.19cm¡¢0.25cm£¬´ÓÖ½´øÖпɿ´³ö
±û
±û
ѧÉúÔÚ²Ù×÷ÉϿ϶¨ÓдíÎ󣬿ÉÄܵÄÔ­ÒòÊÇ
ÏÈ·ÅÊÖºó²åµçÔ´
ÏÈ·ÅÊÖºó²åµçÔ´
£®
£¨2£©ÔÚÒ»´ÎʵÑéÖУ¬ÖÊÁ¿m=1kgµÄÖØÎï×ÔÓÉÏÂÂ䣬ÔÚÖ½´øÉÏ´ò³öһϵÁеĵ㣬ÈçͼËùʾ£¨ÏàÁÚ¼ÆÊýµãʱ¼ä¼ä¸ôΪ0.02s£©£¬µ¥Î»cm£¬ÄÇôֽ´øµÄ
×ó
×ó
¶ËÓëÖØÎïÏàÁ¬£» ´òµã¼ÆʱÆ÷´òϼÆÊýµãBʱ£¬ÎïÌåµÄËÙ¶ÈvB=
0.975m/s
0.975m/s
£» ´ÓÆðµãOµ½´òϼÆÊýµãBµÄ¹ý³ÌÖÐÖØÁ¦ÊÆÄܼõÉÙÁ¿¡÷EP=
0.49J
0.49J
£» ´Ë¹ý³ÌÖÐÎïÌ嶯ÄܵÄÔö¼ÓÁ¿¡÷EK=
0.48J
0.48J
£¨g=9.80m/s2£©£» Í¨¹ý¼ÆË㣬ÊýÖµÉÏ¡÷EP
£¾
£¾
¡÷EK£¨Ìî¡°£¾¡±¡¢¡°=¡±¡¢»ò¡°£¼¡±£©£¬ÕâÊÇÒòΪ
Ô˶¯¹ý³Ì´æÔÚ×èÁ¦
Ô˶¯¹ý³Ì´æÔÚ×èÁ¦
£»ÊµÑéµÄ½áÂÛÊÇ
ÔÚÎó²îÔÊÐíµÄ·¶Î§ÄÚ»úеÄÜÊغã
ÔÚÎó²îÔÊÐíµÄ·¶Î§ÄÚ»úеÄÜÊغã
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÔÚÑéÖ¤»úеÄÜÊغ㶨ÂɵÄʵÑéÖУ¬Ê¹ÖÊÁ¿Îªm=200gµÄÖØÎï×ÔÓÉÏÂÂ䣬´òµã¼ÆʱÆ÷ÔÚÖ½´øÉÏ´ò³öһϵÁеĵ㣬ѡȡһÌõ·ûºÏʵÑéÒªÇóµÄÖ½´øÈçͼËùʾ£®OΪֽ´øÏÂÂäµÄÆðʼµã£¬A¡¢B¡¢CΪֽ´øÉÏÑ¡È¡µÄÈý¸öÁ¬Ðøµã£®ÒÑÖª´òµã¼ÆʱÆ÷ÿ¸ôT=0.02s´òÒ»¸öµã£¬µ±µØµÄÖØÁ¦¼ÓËÙ¶ÈΪg=9.8m/s2£¬ÄÇô
£¨1£©¼ÆËãBµã˲ʱËÙ¶Èʱ£¬¼×ͬѧÓÃv
 
2
B
=2gsOB£¬ÒÒͬѧÓÃvB=
SAC
2T
ÆäÖÐËùÑ¡Ôñ·½·¨ÕýÈ·µÄÊÇ
 
£¨Ìî¡°¼×¡±»ò¡°ÒÒ¡±£©Í¬Ñ§£®
£¨2£©Èôͬѧ±û²»É÷½«ÉÏÊöÖ½´ø´ÓOAÖ®¼ä³¶¶Ï£¬Ëû½öÀûÓÃAµãÖ®ºóµÄÖ½´øÄÜ·ñʵÏÖÑéÖ¤»úеÄÜÊغ㶨ÂɵÄÄ¿µÄ
 
£®£¨Ìî¡°ÄÜ¡±»ò¡°²»ÄÜ¡±£©
£¨3£©Í¬Ñ§¶¡¸ù¾ÝÖ½´øÉϵIJâÁ¿Êý¾Ý¼ÆËã·¢ÏÖÖØÎïºÍÖ½´øÏÂÂä¹ý³ÌÖÐÖØÁ¦ÊÆÄܵļõÉÙÁ¿ºÍ¶¯ÄܵÄÔö¼ÓÁ¿²¢·ÇÑϸñÏàµÈ£¬ËûÈÏΪÖ÷ÒªÔ­ÒòÊÇÖØÎïºÍÖ½´øÏÂÂä¹ý³ÌÖÐËùÊܵÄ×èÁ¦ÒýÆðµÄ£¬¸ù¾ÝÖ½´øÉϵIJâÁ¿Êý¾Ý£¬Ëû¼ÆËã³ö×èÁ¦f=
 
N£®
¾«Ó¢¼Ò½ÌÍø

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸