ÌâÄ¿ÄÚÈÝ
ÀûÓô«¸ÐÆ÷ºÍ¼ÆËã»ú¿ÉÒÔÑо¿Á¦µÄ´óС±ä»¯Çé¿ö£¬ÊµÑéʱÈÃijͬѧ´Ó×À×ÓÉÏÌøÏ£¬×ÔÓÉÏÂÂäHºóË«½Å´¥µØ£¬Ëû˳ÊÆÍäÇúË«ÍÈ£¬ÆäÖØÐÄÓÖϽµÁËh£®¼ÆËã»úÏÔʾ¸ÃͬѧÊܵ½µØÃæÖ§³ÖÁ¦FNËæʱ¼ä±ä»¯µÄͼÏóÈçͼËùʾ£¬¸ù¾ÝͼÏóÌṩµÄÐÅÏ¢£¬ÒÔÏÂÅжϴíÎóµÄ£¨¡¡¡¡£©
·ÖÎö£º¸ù¾ÝÖ§³ÖÁ¦ºÍÖØÁ¦µÄ´óС¹Øϵ£¬ÔËÓÃÅ£¶ÙµÚ¶þ¶¨ÂÉÅжϼÓËٶȵķ½Ïò£¬´Ó¶øÅжϳö¸ÃͬѧËù´¦µÄ״̬£®
½â´ð£º½â£ºA¡¢ÔÚ0µ½t2ʱ¼äÄÚ£¬Ö§³ÖÁ¦µÄ´óССÓÚÖØÁ¦£¬¼ÓËٶȴóСÏòÏ£¬ËùÒÔ¸Ãͬѧ´¦ÓÚʧÖØ״̬£®¹ÊAÕýÈ·£®
B¡¢ÔÚt2µ½t3ʱ¼äÄÚ£¬Ö§³ÖÁ¦µÄ´óС´óÓÚÖØÁ¦£¬¼ÓËٶȷ½ÏòÏòÉÏ£¬ËùÒÔ¸Ãͬѧ´¦ÓÚ³¬ÖØ״̬£®¹ÊBÕýÈ·£®
C¡¢t3ʱ¿Ì£¬Ö§³ÖÁ¦´óÓÚÖØÁ¦£¬ºÏÁ¦²»ÎªÁ㣬¼ÓËٶȲ»ÎªÁ㣮¹ÊC´íÎó£®
D¡¢¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨Âɵãºa=
£¬ÔÚt3µ½t4ʱ¼äÄÚ£¬FÔÚ¼õС£¬ËùÒÔ¼ÓËÙ¶ÈÔÚ¼õС£®¹ÊDÕýÈ·£®
±¾ÌâÑ¡´íÎóµÄ
¹ÊÑ¡£ºC£®
B¡¢ÔÚt2µ½t3ʱ¼äÄÚ£¬Ö§³ÖÁ¦µÄ´óС´óÓÚÖØÁ¦£¬¼ÓËٶȷ½ÏòÏòÉÏ£¬ËùÒÔ¸Ãͬѧ´¦ÓÚ³¬ÖØ״̬£®¹ÊBÕýÈ·£®
C¡¢t3ʱ¿Ì£¬Ö§³ÖÁ¦´óÓÚÖØÁ¦£¬ºÏÁ¦²»ÎªÁ㣬¼ÓËٶȲ»ÎªÁ㣮¹ÊC´íÎó£®
D¡¢¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨Âɵãºa=
F-mg |
m |
±¾ÌâÑ¡´íÎóµÄ
¹ÊÑ¡£ºC£®
µãÆÀ£º½â´ð±¾ÌâÒªÖªµÀ³¬ÖØʧÖصĺ¬Ò壬µ±¼ÓËٶȷ½ÏòÏòÉÏʱ³¬ÖØ£¬µ±¼ÓËٶȷ½ÏòÏòÏÂʱʧÖØ£¬ÄѶȲ»´ó£¬ÊôÓÚ»ù´¡Ì⣮
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
ÀûÓô«¸ÐÆ÷ºÍ¼ÆËã»ú¿ÉÒÔ²âÁ¿¿ìËٱ仯µÄÁ¦£®Èçͼ1°ÑСÇòÏàÁ¬µÄµ¯ÐÔϸÉþµÄÉ϶ËÓë´«¸ÐÆ÷ÏàÁ¬£¬Ð¡Çò¾Ù¸ßµ½Éþ×ÓµÄÐüµã0´¦£¬È»ºóÈÃÆä×ÔÓÉÏÂÂ䣬ÓÃÕâÖÖ·½·¨¿É»ñµÃÉþ×ÓÀ½ôʱÉþÖÐÀÁ¦FËæʱ¼ät±ä»¯µÄͼÏߣ¨Í¼2£©£¬¸ù¾ÝͼÏßËùÌṩµÄÐÅÏ¢¿ÉÅж¨ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A¡¢t1ʱ¿ÌСÇòËÙ¶È×î´ó | B¡¢t2ʱ¿ÌÉþ×Ó× | C¡¢t3ʱ¿ÌСÇò¶¯ÄÜ×î´ó | D¡¢t3Óët4ʱ¿ÌСÇòËÙ¶ÈÏàͬ |