ÌâÄ¿ÄÚÈÝ
![¾«Ó¢¼Ò½ÌÍø](http://thumb.1010pic.com/pic3/upload/images/201312/125/eba9abf9.png)
A¡¢ÈôÈ¡A´¦Îª²Î¿¼Ã棬СÇòÔÚBµã¾ßÓеĻúеÄÜÊÇ
| ||
B¡¢ÈôÈ¡B´¦Îª²Î¿¼Ã棬СÇòÔÚAµã¾ßÓеĻúеÄÜÊÇ
| ||
C¡¢ÈôÈ¡µØÃæΪ²Î¿¼Ã棬СÇòÔÚCµã¾ßÓеĻúеÄÜ
| ||
D¡¢ÎÞÂÛÈ¡ºÎ´¦Îª²Î¿¼Ã棬СÇò¾ßÓеĻúеÄܶ¼ÊÇ
|
·ÖÎö£º²»¼Æ¿ÕÆø×èÁ¦£¬Ð¡ÇòÖ»ÊÜÖØÁ¦£¬»úеÄÜÊغ㣬¶ø»úеÄܵÈÓÚÖØÁ¦ÊÆÄÜÓ붯ÄÜÖ®ºÍ£¬ÖØÁ¦ÊÆÄܵļÆË㹫ʽEp=mgh£¬hÊÇÏà¶ÔÓڲο¼Æ½ÃæµÄ¸ß¶È£®¸ù¾Ý»úеÄÜÊغ㶨ÂÉÁÐʽ·ÖÎö£®
½â´ð£º½â£º
A¡¢ÈôÈ¡A´¦Îª²Î¿¼Ã棬СÇòÔÚAµãʱµÄÖØÁ¦ÊÆÄÜΪ0£¬¶¯ÄÜΪ
mv2£¬»úеÄÜΪ
mv2£¬Ð¡ÇòÅ׳ö¹ý³ÌÖУ¬»úеÄÜÊغ㣬ËùÒÔСÇòÔÚBµã¾ßÓеĻúеÄÜÊÇ
mv2£¬¹ÊA´íÎó£®
B¡¢ÈôÈ¡B´¦Îª²Î¿¼Ã棬СÇòÔÚAµãµÄÖØÁ¦ÊÆÄÜΪmg£¨H-h£©£¬¶¯ÄÜΪ
mv2£¬¾ßÓеĻúеÄÜÊÇ
mv2+mg£¨H-h£©£¬¹ÊB´íÎó£®
C¡¢ÈôÈ¡µØÃæΪ²Î¿¼Ã棬СÇòÔÚAµãʱµÄÖØÁ¦ÊÆÄÜΪmgH£¬¶¯ÄÜΪ
mv2£¬»úеÄÜΪ
mv2+mgH£¬Ð¡ÇòÅ׳ö¹ý³ÌÖУ¬»úеÄÜÊغ㣬ËùÒÔСÇòÔÚCµã¾ßÓеĻúеÄÜÊÇ
mv2+mgH£¬¹ÊCÕýÈ·£®
D¡¢ÓÉÉÏ·ÖÎö¿ÉÖª£¬ÓÉÖØÁ¦ÊÆÄÜÊÇÏà¶ÔµÄ£¬Ñ¡Ôñ²»Í¬µÄ²Î¿¼Æ½Ã棬ÖØÁ¦ÊÆÄܲ»Í¬£¬Ôò»úеÄܲ»Í¬£¬¹ÊD´íÎó£®
¹ÊÑ¡£ºC
A¡¢ÈôÈ¡A´¦Îª²Î¿¼Ã棬СÇòÔÚAµãʱµÄÖØÁ¦ÊÆÄÜΪ0£¬¶¯ÄÜΪ
1 |
2 |
1 |
2 |
1 |
2 |
B¡¢ÈôÈ¡B´¦Îª²Î¿¼Ã棬СÇòÔÚAµãµÄÖØÁ¦ÊÆÄÜΪmg£¨H-h£©£¬¶¯ÄÜΪ
1 |
2 |
1 |
2 |
C¡¢ÈôÈ¡µØÃæΪ²Î¿¼Ã棬СÇòÔÚAµãʱµÄÖØÁ¦ÊÆÄÜΪmgH£¬¶¯ÄÜΪ
1 |
2 |
1 |
2 |
1 |
2 |
D¡¢ÓÉÉÏ·ÖÎö¿ÉÖª£¬ÓÉÖØÁ¦ÊÆÄÜÊÇÏà¶ÔµÄ£¬Ñ¡Ôñ²»Í¬µÄ²Î¿¼Æ½Ã棬ÖØÁ¦ÊÆÄܲ»Í¬£¬Ôò»úеÄܲ»Í¬£¬¹ÊD´íÎó£®
¹ÊÑ¡£ºC
µãÆÀ£º½â¾ö±¾Ìâ¹Ø¼üÀí½âÖØÁ¦ÊÆÄܵÄÏà¶ÔÐÔ£¬ÕÆÎÕ»úеÄÜÊغ㶨ÂÉ£¬²¢ÄÜÁé»îÔËÓã®
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
![¾«Ó¢¼Ò½ÌÍø](http://thumb.1010pic.com/pic3/upload/images/201312/26/d36f07ea.png)
A¡¢µØÃæ¶ÔШÐÎÎï¿éµÄÖ§³ÖÁ¦Îª£¨M+m£©g | B¡¢µØÃæ¶ÔШÐÎÎï¿éµÄĦ²ÁÁ¦ÎªÁã | C¡¢Ð¨ÐÎÎï¿é¶ÔСÎï¿éĦ²ÁÁ¦¿ÉÄÜΪÁã | D¡¢Ð¡Îï¿éÒ»¶¨Êܵ½ËĸöÁ¦×÷Óà |