ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÈçͼËùʾΪijÖÐѧÎïÀí¿ÎÍâѧϰС×éÉè¼ÆµÄ²â¶¨µ±µØÖØÁ¦¼ÓËٶȵÄʵÑé×°Öã¬ËûÃǵÄÖ÷Òª²Ù×÷ÈçÏ£º
ʵÑé´ÎÊý | h/cm | t/s | v/(m¡¤s£1) |
1 | 10.0 | 0.028 | 3.57 |
2 | 20.0 | 0.059 | 3.39 |
3 | 30.0 | 0.092 | 3.26 |
4 | 40.0 | 0.131 | 3.05 |
5 | 50.0 | 0.176 | 2.84 |
6 | 60.0 | 0.235 | 2.55 |
¢Ù°²×°ÊµÑéÆ÷²Ä£¬µ÷½ÚÊԹܼÐ(СÌúÇò)¡¢¹âµçÃźÍÖ½±ÔÚͬһÊúÖ±ÏßÉÏ£»
¢Ú´ò¿ªÊԹܼУ¬Óɾ²Ö¹ÊÍ·ÅСÌúÇò£¬Óùâµç¼ÆʱÆ÷¼Ç¼СÌúÇòÔÚÁ½¸ö¹âµçÃżäµÄÔ˶¯Ê±¼ät£¬²¢Óÿ̶ȳß(ͼÉÏδ»³ö)²âÁ¿³öÁ½¸ö¹âµçÃÅÖ®¼äµÄ¸ß¶Èh£¬¼ÆËã³öСÌúÇòͨ¹ýÁ½¹âµçÃżäµÄƽ¾ùËÙ¶Èv£»
¢Û¹Ì¶¨¹âµçÃÅBµÄλÖò»±ä£¬¸Ä±ä¹âµçÃÅAµÄ¸ß¶È£¬Öظ´¢ÚµÄ²Ù×÷£®²â³ö¶à×é(h£¬t)£¬¼ÆËã³ö¶ÔÓ¦µÄƽ¾ùËÙ¶Èv£»
¢Ü»³öv¡ªtͼÏó£®
Çë¸ù¾ÝʵÑ飬»Ø´ðÈçÏÂÎÊÌ⣺
(1)ÉèСÌúÇòµ½´ï¹âµçÃÅBʱµÄËÙ¶ÈΪvB£¬µ±µØµÄÖØÁ¦¼ÓËÙ¶ÈΪg£¬ÔòСÌúÇòͨ¹ýÁ½¹âµçÃżäƽ¾ùËÙ¶ÈvµÄ±í´ïʽΪ__________________£®(ÓÃvB¡¢gºÍt±íʾ)
(2)ʵÑé²âµÃµÄÊý¾ÝÈçÏÂ±í£ºÇëÔÚ×ø±êÖ½ÉÏ»³öv¡ªtͼÏ󣨸ù¾ÝͼÏñ×÷´ð£¬²»±Ø»ÔÚ´ðÌâÖ½ÉÏ£©£®
()¸ù¾Ýv¡ªtͼÏ󣬿ÉÒÔÇóµÃµ±µØÖØÁ¦¼ÓËÙ¶Èg£½________m/s2£¬ÊԹܼе½¹âµçÃÅBµÄ¾àÀëԼΪ___cm.(ÒÔÉϽá¹û¾ù±£Áô3λÓÐЧÊý×Ö)
¡¾´ð°¸¡¿v£½vB£gt 9.86 69.8
¡¾½âÎö¡¿
£¨1£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯Öмäʱ¿ÌµÄËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȣ¬¿ÉµÃСÌúÇòͨ¹ýÁ½¹âµçÃżäƽ¾ùËÙ¶ÈvµÄ±í´ïʽ£»
£¨2£©¸ù¾Ýv-tͼÏñбÂʺͽؾàµÄÒâÒ壬¿ÉÇ󵱵صÄÖØÁ¦¼ÓËٶȺÍBµãËٶȣ¬¸ù¾ÝËÙ¶ÈλÒƹØϵ£¬¿ÉÇóÊԹܼе½¹âµçÃÅBµÄ¾àÀë¡£
(1)¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯Öмäʱ¿ÌµÄËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȣ¬¿ÉµÃСÌúÇòͨ¹ýÁ½¹âµçÃżäƽ¾ùËÙ¶ÈvµÄ±í´ïʽΪv£½vB£
gt.
(2) ÒÀ¾ÝÌâÖÐÊý¾ÝÃèµãÁ¬Ïߣ¬ÈçͼËùʾ£®
(3)СÌúÇòͨ¹ýÁ½¹âµçÃżäƽ¾ùËÙ¶ÈvµÄ±í´ïʽΪv£½vB£gt£¬ËùÒÔv¡ªtͼÏóµÄбÂÊ´óС±íʾ
g£¬Ôòµ±µØÖØÁ¦¼ÓËÙ¶Èg£½2k¡Ö9.86 m/s2£¬Í¼ÏóÔÚvÖáÉϵĽؾàµÈÓÚvB£¬¸ù¾ÝͼÏóµÃ³övB¡Ö3.71 m/s£¬¸ù¾Ý
£¬µÃÊԹܼе½¹âµçÃÅBµÄ¾àÀëԼΪh=
¡Ö69.8 cm.
![](http://thumb2018.1010pic.com/images/loading.gif)