ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÈçͼËùʾ£¬Ò»ÖÊÁ¿Îª2kgµÄÎï¿éB£¬¾²Ö¹Ôڹ⻬ˮƽÃæÉÏ£¬×ó²à¹Ì¶¨Ò»Ë®Æ½ÇáÖʵ¯»É£¬ÁíÒ»ÖÊÁ¿Îª3kgµÄÎï¿éAÏòÓÒÒÔ5m/sµÄËÙ¶Èײ»÷µ¯»É£¬Õû¸öײ»÷¹ý³ÌÖУ¬Á½Îï¿éµÄËÙ¶ÈʼÖÕÔÚÒ»ÌõÖ±ÏßÉÏ£¬µ¯»ÉʼÖÕÔÚµ¯ÐÔÏÞ¶ÈÄÚ£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A.Îï¿éAµÄ×îÖÕËٶȴóСΪ3m/s
B.Îï¿éBµÄ×îÖÕËٶȴóСΪ5m/s
C.µ¯»ÉµÄ×î´óµ¯ÐÔÊÆÄÜΪ15J
D.ÈôÆäËûÌõ¼þ²»±ä¶ø½öÔö´óÎï¿éAµÄÖÊÁ¿£¬ÔòÎï¿éBµÄ×îÖÕËٶȿÉÄÜΪ12m/s
¡¾´ð°¸¡¿C
¡¾½âÎö¡¿
AB£®µ±µ¯»ÉÔٴλָ´Ô³¤Ê±£¬Îï¿é¡¢´ïµ½×îÖÕËٶȣ¬¸ù¾Ý¶¯Á¿Êغã
¸ù¾ÝÄÜÁ¿ÊغãÓÐ
ÁªÁ¢½âµÃ
¹ÊA¡¢B´íÎó£»
C£®µ±µ¯»ÉѹËõÖÁ×î¶Ìʱ£¬µ¯»ÉµÄµ¯ÐÔÊÆÄÜ×î´ó£¬¸ù¾Ý¶¯Á¿ÊغãÓÐ
¸ù¾ÝÄÜÁ¿ÊغãÓÐ
ÁªÁ¢½âµÃ
¹ÊCÕýÈ·£»
D£®µ±µ¯»ÉÔٴλָ´Ô³¤Ê±£¬Îï¿é¡¢´ïµ½×îÖÕËٶȣ¬¸ù¾Ý¶¯Á¿ÊغãºÍÄÜÁ¿ÊغãÖª£¬Îï¿éBµÄ×îÖÕËÙ¶È
µ±Ê±£¬ÔòÓÐ
Îï¿éBµÄ×îÖÕËٶȵÄ×î´óΪ£¬¹ÊD´íÎó£»
¹ÊÑ¡C¡£
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿