ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ£¬¾²Ö¹·ÅÔÚˮƽ×ÀÃæÉϵÄÖ½´ø£¬ÆäÉÏÓÐÒ»ÖÊÁ¿Îªm=0.1 kgµÄÌú¿é£¬ËüÓëÖ½´øÓҶ˵ľàÀëΪL=0.5m£¬ËùÓнӴ¥ÃæÖ®¼äµÄ¶¯Ä¦²ÁÒòÊýÏàͬ¡£ÏÖÓÃˮƽÏò×óµÄºãÁ¦£¬¾2sʱ¼ä½«Ö½´ø´ÓÌú¿éϳé³ö£¬µ±Ö½´øÈ«²¿³é³öʱÌú¿éÇ¡ºÃµ½´ï×ÀÃæ±ßÔµÇÒËÙ¶ÈΪv=2m/s¡£ÒÑÖª×ÀÃæ¸ß¶ÈΪH=0.8m£¬²»¼ÆÖ½´øÖØÁ¦£¬Ìú¿éÊÓΪÖÊµã¡£ÖØÁ¦¼ÓËÙ¶ÈgÈ¡10m/s2£¬Çó£º
£¨1£©Ìú¿éÅ׳öºóÂ䵨µãÀëÅ׳öµãµÄˮƽ¾àÀ룻
£¨2£©¶¯Ä¦²ÁÒòÊý£»
£¨3£©Ö½´ø³é³ö¹ý³ÌÖÐϵͳ²úÉúµÄÄÚÄÜ¡£
£¨1£©0£®8 m£»£¨2£©0£®1£»£¨3£©0£®3 J
¡¾½âÎö¡¿£¨14·Ö£©½â£º£¨1£©ÉèÌú¿éÀ뿪×ÀÃæºó¾Ê±¼ätÂ䵨
ˮƽ·½Ïò£ºx£½vt ¢Ù¡¡¡£¨1·Ö£©
ÊúÖ±·½Ïò£ºH£½
gt2 ¢Ú ¡¡¡£¨1·Ö£©
ÓÉ¢Ù¢ÚÁªÁ¢½âµÃ£ºx=0£®8 m£®¡¡¡ £¨2·Ö£©
£¨2£©ÉèÌú¿éµÄ¼ÓËÙ¶ÈΪa1£¬Ô˶¯Ê±¼äΪ
£¬ÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉ£¬µÃ¦Ìmg£½ma1¢Û ¡¡¡£¨1·Ö£©
Ö½´ø³é³öʱ£¬Ìú¿éµÄËÙ¶Èv£½a1t1¢Ü ¡¡¡ £¨1·Ö£©
¢Û¢ÜÁªÁ¢½âµÃ¦Ì=0£®1£® ¡¡¡ £¨2·Ö£©
£¨3£©Ìú¿éµÄÎ»ÒÆx1£½
a1t1 2 ¢Ý
¡¡¡ £¨2·Ö£©
ÉèÖ½´øµÄÎ»ÒÆÎªx2£»ÓÉÌâÒâÖª£¬x2£x1£½L ¢Þ¡¡¡£¨1·Ö£©
Óɹ¦ÄܹØÏµ¿ÉµÃÖ½´ø³é³ö¹ý³ÌÖÐϵͳ²úÉúµÄÄÚÄÜE£½¦Ìmgx2£«¦ÌmgL ¢ß¡¡¡£¨2·Ö£©
ÓɢۢܢݢޢßÁªÁ¢½âµÃE£½0£®3 J¡¡¡ £¨1·Ö£©
|
| ʵÑé´ÎÊý | Ô˶¯×´Ì¬ | µ¯»É³Ó¶ÁÊý/N |
| 1 | ¾²Ö¹ | 0.4 |
| 2 | ¾²Ö¹ | 0.6 |
| 3 | ¼ÓËÙ | 0.7 |
| 4 | ÔÈËÙ | 0.5 |
| 5 | ¼õËÙ | 0.3 |
A£®Ä¾¿éÊܵ½µÄ×î´ó¾²Ä¦²ÁÁ¦Îª0.7N
B£®Ä¾¿éÊܵ½µÄ×î´ó¾²Ä¦²ÁÁ¦¿ÉÄÜΪ0.6N
C£®ÔÚÕâÎå´ÎʵÑéÖУ¬Ä¾¿éÊܵ½µÄĦ²ÁÁ¦´óСÓÐÈý´ÎÊÇÏàͬµÄ
D£®ÔÚÕâÎå´ÎʵÑéÖУ¬Ä¾¿éÊܵ½µÄĦ²ÁÁ¦´óСֻÓÐÁ½´ÎÊÇÏàͬµÄ
| ʵÑé´ÎÊý | Ô˶¯×´Ì¬ | µ¯»É³Ó¶ÁÊý/N |
| 1 | ¾²Ö¹ | 0.4 |
| 2 | ¾²Ö¹ | 0.6 |
| 3 | ¼ÓËÙ | 0.7 |
| 4 | ÔÈËÙ | 0.5 |
| 5 | ¼õËÙ | 0.3 |
A£®Ä¾¿éÊܵ½µÄ×î´ó¾²Ä¦²ÁÁ¦Îª0.7N
B£®Ä¾¿éÊܵ½µÄ×î´ó¾²Ä¦²ÁÁ¦¿ÉÄÜΪ0.6N
C£®ÔÚÕâÎå´ÎʵÑéÖУ¬Ä¾¿éÊܵ½µÄĦ²ÁÁ¦´óСÓÐÈý´ÎÊÇÏàͬµÄ
D£®ÔÚÕâÎå´ÎʵÑéÖУ¬Ä¾¿éÊܵ½µÄĦ²ÁÁ¦´óСֻÓÐÁ½´ÎÊÇÏàͬµÄ