ÌâÄ¿ÄÚÈÝ
ÔÚ¡°ÀûÓôòµã¼ÆʱÆ÷²â¶¨ÔȼÓËÙÖ±ÏßÔ˶¯¼ÓËٶȡ±µÄʵÑéÖУ¬Ä³Í¬Ñ§ÔÚ´ò³öµÄÖ½´øÉÏÿ5µãÈ¡Ò»¸ö¼ÆÊýµã£¬¹²È¡ÁËA¡¢B¡¢C¡¢D¡¢E¡¢FÁù¸ö¼ÆÊýµã£¨Ã¿ÏàÁÚÁ½¸ö¼ÆÊýµã¼äµÄËĸöµãδ»³ö£©ÈçÓÒͼ£®´Óÿһ¸ö¼ÆÊýµã´¦½«Ö½´ø¼ô¿ª·Ö³ÉÎå¶Î£¨·Ö±ð½Ða¡¢b¡¢c¡¢d¡¢e¶Î£©£¬½«ÕâÎå¶ÎÖ½´øÓɶ̵½³¤½ô¿¿µ«²»ÖصþµØÕ³ÔÚxoy×ø±êϵÖУ¬Èç×óͼËùʾ£¬ÓÉ´Ë¿ÉÒԵõ½Ò»Ìõ±íʾv-t¹ØϵµÄͼÏߣ¬´Ó¶ø¿ÉÇó³ö¼ÓËٶȣ®
£¨1£©£®ÇëÄãÔÚxoy×ø±êϵÖÐÓÃ×î¼ò½àµÄ·½·¨×÷³öÄܱíʾv-t¹ØϵµÄͼÏߣ¨×÷´ðÔÚ´ðÌâÖ½ÉÏ£©£¬²¢Ö¸³öÄĸöÖáÏ൱ÓÚvÖ᣿´ð£º
£¨2£©£®ÕâÖÖʵÑéÊý¾Ý´¦ÀíµÄ·½·¨¿É³ÆΪ
A£®Àà±È·¨
B£®µÈЧÌæ´ú·¨
C£®±ÈÖµ·¨
D£®¿ØÖƱäÁ¿·¨
£¨3£©£®´ÓµÚÒ»¸ö¼ÆÊýµã¿ªÊ¼¼Æʱ£¬ÒªÏëÇó³ö0.25sʱ¿ÌµÄ˲ʱËٶȣ¬ÐèÒª²â³öÄÄÒ»¶ÎÖ½´øµÄ³¤¶È£¿´ð£º
£¨4£©£®Èô²âµÃa¶ÎÖ½´øµÄ³¤¶ÈΪ2.0cm£¬e¶ÎÖ½´øµÄ³¤¶ÈΪ10.0cm£¬ÔòÎïÌåµÄ¼ÓËÙ¶ÈΪ
£¨1£©£®ÇëÄãÔÚxoy×ø±êϵÖÐÓÃ×î¼ò½àµÄ·½·¨×÷³öÄܱíʾv-t¹ØϵµÄͼÏߣ¨×÷´ðÔÚ´ðÌâÖ½ÉÏ£©£¬²¢Ö¸³öÄĸöÖáÏ൱ÓÚvÖ᣿´ð£º
yÖáÏ൱ÓÚvÖá
yÖáÏ൱ÓÚvÖá
£®£¨2£©£®ÕâÖÖʵÑéÊý¾Ý´¦ÀíµÄ·½·¨¿É³ÆΪ
B
B
A£®Àà±È·¨
B£®µÈЧÌæ´ú·¨
C£®±ÈÖµ·¨
D£®¿ØÖƱäÁ¿·¨
£¨3£©£®´ÓµÚÒ»¸ö¼ÆÊýµã¿ªÊ¼¼Æʱ£¬ÒªÏëÇó³ö0.25sʱ¿ÌµÄ˲ʱËٶȣ¬ÐèÒª²â³öÄÄÒ»¶ÎÖ½´øµÄ³¤¶È£¿´ð£º
c
c
£®£¨4£©£®Èô²âµÃa¶ÎÖ½´øµÄ³¤¶ÈΪ2.0cm£¬e¶ÎÖ½´øµÄ³¤¶ÈΪ10.0cm£¬ÔòÎïÌåµÄ¼ÓËÙ¶ÈΪ
2.0
2.0
m/s2£®·ÖÎö£ºÊ¹Óõķ½·¨ÊǵÈЧ´úÌæ·¨½âÌ⣬ËüÃǵij¤¶È·Ö±ðµÈÓÚx=vƽ¾ùt£¬ÒòΪ¼ô¶ÏµÄÖ½´øËùÓõÄʱ¼ä¶¼ÊÇt=0.1s£¬¼´Ê±¼ätÏàµÈ£¬ËùÒÔÖ½´øµÄ³¤¶ÈÖ®±ÈµÈÓڴ˶ÎÖ½´øµÄƽ¾ùËÙ¶ÈÖ®±È£»
¶ø´Ë¶ÎÖ½´øµÄƽ¾ùËٶȵÈÓÚÕâ¶ÎÖ½´øÖмäʱ¿ÌµÄËٶȣ¬×îºóµÃ³ö½áÂÛÖ½´øµÄ³¤¶ÈÖ®±ÈµÈÓڴ˶ÎÖ½´øµÄƽ¾ùËÙ¶ÈÖ®±È£¬»¹µÈÓÚ¸÷¶ÎÖ½´øÖмäʱ¿ÌµÄËÙ¶ÈÖ®±È£¬¼´Ö½´øµÄ¸ß¶ÈÖ®±ÈµÈÓÚÖмäʱ¿ÌËÙ¶ÈÖ®±È£®
¶ø´Ë¶ÎÖ½´øµÄƽ¾ùËٶȵÈÓÚÕâ¶ÎÖ½´øÖмäʱ¿ÌµÄËٶȣ¬×îºóµÃ³ö½áÂÛÖ½´øµÄ³¤¶ÈÖ®±ÈµÈÓڴ˶ÎÖ½´øµÄƽ¾ùËÙ¶ÈÖ®±È£¬»¹µÈÓÚ¸÷¶ÎÖ½´øÖмäʱ¿ÌµÄËÙ¶ÈÖ®±È£¬¼´Ö½´øµÄ¸ß¶ÈÖ®±ÈµÈÓÚÖмäʱ¿ÌËÙ¶ÈÖ®±È£®
½â´ð£º½â£ºÃ¿ÏàÁÚÁ½¸ö¼ÆÊýµã¼äµÄËĸöµãδ»³ö£¬ÏàÁڵļÆÊýµãʱ¼ä¼ä¸ôÊÇ0.1s£®
£¨1£©Ö½´øµÄ¸ß¶ÈÖ®±ÈµÈÓÚÖмäʱ¿ÌËÙ¶ÈÖ®±È£¬ÒÔAµãΪt=0ʱ¿Ì£¬Í¼ÖÐa¶ÎÖ½´ø¸ß¶È´ú±í0.05sʱµÄ˲ʱËٶȣ¬bÖ½´ø¸ß¶È´ú±í0.15sʱµÄ˲ʱËٶȣ¬cÖ½´ø¸ß¶È´ú±í0.25sʱµÄ˲ʱËٶȣ¬dµÄ¸ß¶È´ú±í0.35sʱµÄ˲ʱËٶȣ¬e´ú±í0.45sʱµÄ˲ʱËٶȣ®ËùÒÔÔÚxoy×ø±êϵÖÐÓÃ×î¼ò½àµÄ·½·¨×÷³öÄܱíʾv-t¹ØϵµÄͼÏߣ¬ÈçͼÖÐ×óͼËùʾ£® yÖáÏ൱ÓÚvÖá»òÕßÒÔa¶ÎÖ½´øÖмäʱ¿ÌΪt=0ʱ¿Ì£¬ÈçͼÖÐÓÒͼËùʾ£º
£¨2£©ÕâÖÖʵÑéÊý¾Ý´¦ÀíµÄ·½·¨¿É³ÆΪµÈЧ´úÌæ·¨£¬¼ô¶ÏµÄÖ½´ø¿í¶ÈÏàµÈ´úÌæ¼ä¸ôËùÓõÄʱ¼ä¶¼ÊÇt=0.1s£¬¼´Ê±¼ätÏàµÈ£®Ö½´øµÄ³¤¶ÈÖ®±ÈµÈÓڴ˶ÎÖ½´øµÄƽ¾ùËÙ¶ÈÖ®±È£¬Ö½´øµÄ³¤¶È´úÌæ¸Ã¶ÎµÄÖмäʱ¿ÌµÄ˲ʱËٶȣ®
¹ÊÑ¡B£®
£¨3£©cÖ½´ø¸ß¶È´ú±í0.15sʱµÄ˲ʱËٶȣ¬ËùÒÔΪÇó³ö0.15sʱ¿ÌµÄ˲ʱËٶȣ¬ÐèÒª²â³öc¶ÎÖ½´øµÄ³¤¶È£®
£¨4£©Èô²âµÃa¶ÎÖ½´øµÄ³¤¶ÈΪ2.0cm£¬Ê±¼äʱ0.1s£¬ËùÒÔƽ¾ùËÙ¶ÈÒ²¾ÍÊÇ0.05sʱµÄ˲ʱËÙ¶ÈΪ0.2m/s£»e¶ÎÖ½´øµÄ³¤¶ÈΪ10.0cm£¬ËùÒÔƽ¾ùËÙ¶ÈÒ²¾ÍÊÇ0.45sʱµÄ˲ʱËÙ¶ÈΪ1m/s£»ÓÉÓÉÒÔÉÏ¿ÉÖª¡÷v=0.8m/s£¬¡÷t=0.4s£»
ËùÒÔ¼ÓËÙ¶Èa=
=2.0m/s2
¹Ê´ð°¸Îª£º£¨1£©v-tͼÏßÈçͼʾ yÖáÏ൱ÓÚvÖá
£¨2£©B
£¨3£©C
£¨4£©2.0
£¨1£©Ö½´øµÄ¸ß¶ÈÖ®±ÈµÈÓÚÖмäʱ¿ÌËÙ¶ÈÖ®±È£¬ÒÔAµãΪt=0ʱ¿Ì£¬Í¼ÖÐa¶ÎÖ½´ø¸ß¶È´ú±í0.05sʱµÄ˲ʱËٶȣ¬bÖ½´ø¸ß¶È´ú±í0.15sʱµÄ˲ʱËٶȣ¬cÖ½´ø¸ß¶È´ú±í0.25sʱµÄ˲ʱËٶȣ¬dµÄ¸ß¶È´ú±í0.35sʱµÄ˲ʱËٶȣ¬e´ú±í0.45sʱµÄ˲ʱËٶȣ®ËùÒÔÔÚxoy×ø±êϵÖÐÓÃ×î¼ò½àµÄ·½·¨×÷³öÄܱíʾv-t¹ØϵµÄͼÏߣ¬ÈçͼÖÐ×óͼËùʾ£® yÖáÏ൱ÓÚvÖá»òÕßÒÔa¶ÎÖ½´øÖмäʱ¿ÌΪt=0ʱ¿Ì£¬ÈçͼÖÐÓÒͼËùʾ£º
£¨2£©ÕâÖÖʵÑéÊý¾Ý´¦ÀíµÄ·½·¨¿É³ÆΪµÈЧ´úÌæ·¨£¬¼ô¶ÏµÄÖ½´ø¿í¶ÈÏàµÈ´úÌæ¼ä¸ôËùÓõÄʱ¼ä¶¼ÊÇt=0.1s£¬¼´Ê±¼ätÏàµÈ£®Ö½´øµÄ³¤¶ÈÖ®±ÈµÈÓڴ˶ÎÖ½´øµÄƽ¾ùËÙ¶ÈÖ®±È£¬Ö½´øµÄ³¤¶È´úÌæ¸Ã¶ÎµÄÖмäʱ¿ÌµÄ˲ʱËٶȣ®
¹ÊÑ¡B£®
£¨3£©cÖ½´ø¸ß¶È´ú±í0.15sʱµÄ˲ʱËٶȣ¬ËùÒÔΪÇó³ö0.15sʱ¿ÌµÄ˲ʱËٶȣ¬ÐèÒª²â³öc¶ÎÖ½´øµÄ³¤¶È£®
£¨4£©Èô²âµÃa¶ÎÖ½´øµÄ³¤¶ÈΪ2.0cm£¬Ê±¼äʱ0.1s£¬ËùÒÔƽ¾ùËÙ¶ÈÒ²¾ÍÊÇ0.05sʱµÄ˲ʱËÙ¶ÈΪ0.2m/s£»e¶ÎÖ½´øµÄ³¤¶ÈΪ10.0cm£¬ËùÒÔƽ¾ùËÙ¶ÈÒ²¾ÍÊÇ0.45sʱµÄ˲ʱËÙ¶ÈΪ1m/s£»ÓÉÓÉÒÔÉÏ¿ÉÖª¡÷v=0.8m/s£¬¡÷t=0.4s£»
ËùÒÔ¼ÓËÙ¶Èa=
¡÷v |
¡÷t |
¹Ê´ð°¸Îª£º£¨1£©v-tͼÏßÈçͼʾ yÖáÏ൱ÓÚvÖá
£¨2£©B
£¨3£©C
£¨4£©2.0
µãÆÀ£ºÖ½´øµÄ³¤¶ÈÖ®±ÈµÈÓڴ˶ÎÖ½´øµÄƽ¾ùËÙ¶ÈÖ®±È£¬»¹µÈÓÚ¸÷¶ÎÖ½´øÖмäʱ¿ÌµÄËÙ¶ÈÖ®±È£¬¼´Ö½´øµÄ¸ß¶ÈÖ®±ÈµÈÓÚÖмäʱ¿ÌËÙ¶ÈÖ®±È£®ÕâÖÖµÈЧÌæ´úµÄ·½·¨¼õСÁ˽âÌâÄѶȣ®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿