ÌâÄ¿ÄÚÈÝ
±±¾©Ê±¼ä2011Äê11ÔÂ3ÈÕÁ賿1ʱ36·Ö£¬Öйú¡°Ì칬һºÅ¡±Ä¿±ê·ÉÐÐÆ÷Óë¡°ÉñÖ۰˺š±Ä¿±ê·ÉÐÐÆ÷ÔÚ¾àµØÇò343¹«ÀïµÄ¹ìµÀ£¬¾ÀúÁ˲¶»ñ¡¢»º³å¡¢À½ü¡¢Ëø½ôµÄ¹ý³Ì£¬×îÖÕʵÏÖÁ¬½Ó£¬ÐγÉ×éºÏÌ壮ÖйúÔØÈ˺½ÌìÊ״οռ佻»á¶Ô½ÓÈ¡µÃÔ²Âú³É¹¦£¬Îª½¨Éè¿Õ¼äÕ¾Âõ³ö¹Ø¼üÒ»²½£®·É´¬ÈÆÐÐËٶȴóÔ¼7800m/s£¬ºÏ
7.8
7.8
km/s£»¶Ô½Ó¹ý³ÌÖи÷ÖÖÐÅÏ¢ÊÇͨ¹ýµç´Å²¨
µç´Å²¨
´«µÝµ½µØÇòÉÏÀ´µÄ£»¾Ý²âË㣬º½ÌìÔ±ÔÚ·µ»Ø²ÕʧÖØ״̬Ï·һ¸ö¸úÍ·¶ÔµØ¾Í·ÉÐÐÁË351km£¬ÔòËûÍê³ÉÒ»¸ö¸ú¶·¶¯×÷ËùÐèÒªµÄʱ¼äÔ¼45
45
s£®·ÖÎö£º£¨1£©¶Ô¸´ºÏµ¥Î»µÄ»»Ë㣬¿ÉÒÔ·Ö×Ó¡¢·Öĸ·Ö±ð»»Ë㣻
£¨2£©µç´Å²¨¿ÉÒÔ´«µÝÐÅÏ¢£¬²¢ÇÒÄܹ»ÔÚÕæ¿ÕÖд«²¥£¬·É´¬ÔÚÌ«¿ÕÖÐÊÇͨ¹ýµç´Å²¨´«²¥ÐÅÏ¢µÄ£®
£¨3£©¸ù¾Ýt=
ÐèÒªµÄʱ¼ä£®
£¨2£©µç´Å²¨¿ÉÒÔ´«µÝÐÅÏ¢£¬²¢ÇÒÄܹ»ÔÚÕæ¿ÕÖд«²¥£¬·É´¬ÔÚÌ«¿ÕÖÐÊÇͨ¹ýµç´Å²¨´«²¥ÐÅÏ¢µÄ£®
£¨3£©¸ù¾Ýt=
s |
v |
½â´ð£º½â£º£¨1£©7800m/s=
=7.8km/s£»
£¨2£©µç´Å²¨¿ÉÒÔ´«µÝÐÅÏ¢£¬²¢ÇÒÄܹ»ÔÚÕæ¿ÕÖд«²¥£¬ËùÒÔ¶Ô½Ó¹ý³ÌÖи÷ÖÖÐÅÏ¢ÊÇͨ¹ýµç´Å²¨´«µÝµ½µØÇòÉÏÀ´µÄ£®
£¨3£©¸ù¾Ýt=
µÃ£º
ÐèÒªµÄʱ¼ät=
=
=45s£®
¹Ê´ð°¸Îª£»7.8£»µç´Å²¨£»45£®
7800¡Á
| ||
s |
£¨2£©µç´Å²¨¿ÉÒÔ´«µÝÐÅÏ¢£¬²¢ÇÒÄܹ»ÔÚÕæ¿ÕÖд«²¥£¬ËùÒÔ¶Ô½Ó¹ý³ÌÖи÷ÖÖÐÅÏ¢ÊÇͨ¹ýµç´Å²¨´«µÝµ½µØÇòÉÏÀ´µÄ£®
£¨3£©¸ù¾Ýt=
s |
v |
ÐèÒªµÄʱ¼ät=
s |
v |
351km |
7.8km/s |
¹Ê´ð°¸Îª£»7.8£»µç´Å²¨£»45£®
µãÆÀ£º±¾Ì⿼²éËٶȵĵ¥Î»»»ËãºÍËٶȹ«Ê½µÄÓ¦Óã¬ÖªµÀµç´Å²¨Äܹ»ÔÚÕæ¿ÕÖд«²¥£¬¿ÉÒÔ´«µÝÐÅÏ¢£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿