ÌâÄ¿ÄÚÈÝ
£¨1£©ÓÃƽľ°å¡¢Ï¸ÉþÌס¢ÏðƤÌõ¡¢²âÁ¦¼ÆµÈ×ö¡°ÑéÖ¤Á¦µÄƽÐÐËıßÐη¨Ôò¡±µÄʵÑ飬ΪÁËʹʵÑéÄܹ»Ë³Àû½øÐУ¬ÇÒ¾¡Á¿¼õСÎó²î£¬ÄãÈÏΪÏÂÁÐ˵·¨»ò×ö·¨Äܹ»´ïµ½ÉÏÊöÄ¿µÄµÄÊÇ__________________
A£®ÓòâÁ¦¼ÆÀϸÉþÌ×ʱ£¬ÀÁ¦Ó¦Ñص¯»ÉµÄÖáÏߣ¬ÇÒÓëˮƽľ°åƽÐÐ
B£®Á½Ï¸ÉþÌ×±ØÐëµÈ³¤
C£®Í¬Ò»´ÎʵÑéÁ½´ÎÀϸÉþÌ×Ðëʹ½áµãµ½´ïͬһλÖÃ
D£®ÓòâÁ¦¼ÆÀÁ½¸öϸÉþÌ×ʱ£¬Á½ÀÁ¦¼Ð½ÇÔ½´óÔ½ºÃ
£¨2£©ÓÃÈçͼʵÑé×°ÖÃÑéÖ¤m1 ¡¢m2×é³ÉµÄϵͳ»úеÄÜÊغ㡣m2´Ó¸ß´¦Óɾ²Ö¹¿ªÊ¼ÏÂÂ䣬m1ÉÏÍÏ×ŵÄÖ½´ø´ò³öһϵÁеĵ㣬¶ÔÖ½´øÉϵĵ㼣½øÐвâÁ¿£¬¼´¿ÉÑéÖ¤»úеÄÜÊغ㶨ÂÉ¡£ÏÂͼ¸ø³öµÄÊÇʵÑéÖлñÈ¡µÄÒ»ÌõÖ½´ø£º0ÊÇ´òϵĵÚÒ»¸öµã£¬Ã¿ÏàÁÚÁ½¼ÆÊýµã¼ä»¹ÓÐ4¸öµã£¨Í¼ÖÐδ±ê³ö£©£¬¼ÆÊýµã¼äµÄ¾àÀëÈçͼËùʾ¡£ÒÑÖªm1= 50g ¡¢m2=150g £¬Ôò£¨gÈ¡10m/s2£¬½á¹û±£ÁôÁ½Î»ÓÐЧÊý×Ö£©
¢ÙÔÚÖ½´øÉÏ´òϼÇÊýµã5ʱµÄËÙ¶Èv = m/s£»
¢ÚÔÚ´òµã0~5¹ý³ÌÖÐϵͳ¶¯ÄܵÄÔöÁ¿¡÷EK = J£¬ÏµÍ³ÊÆÄܵļõÉÙÁ¿¡÷EP = J£¬Óɴ˵óöµÄ½áÂÛÊÇ £»
¢ÛÈôijͬѧ×÷³öͼÏñÈçͼ£¬Ôòµ±µØµÄʵ¼ÊÖØÁ¦¼ÓËÙ¶Èg = m/s2¡£
£¨1£©AC
£¨2£©¢Ù2.4
¢Ú0.58 £»0.60 £»ÔÚÎó²îÔÊÐíµÄ·¶Î§ÄÚ£¬m1 ¡¢m2×é³ÉµÄϵͳ»úеÄÜÊغã
¢Û9.7
½âÎö:ÂÔ
£¨1£©ÓÃƽľ°å¡¢Ï¸ÉþÌס¢ÏðƤÌõ¡¢²âÁ¦¼ÆµÈ×ö¡°ÑéÖ¤Á¦µÄƽÐÐËıßÐη¨Ôò¡±µÄʵÑ飬ΪÁËʹʵÑéÄܹ»Ë³Àû½øÐУ¬ÇÒ¾¡Á¿¼õСÎó²î£¬ÄãÈÏΪÏÂÁÐ˵·¨»ò×ö·¨Äܹ»´ïµ½ÉÏÊöÄ¿µÄµÄÊÇ__________________
A£®ÓòâÁ¦¼ÆÀϸÉþÌ×ʱ£¬ÀÁ¦Ó¦Ñص¯»ÉµÄÖáÏߣ¬ÇÒÓëˮƽľ°åƽÐÐ |
B£®Á½Ï¸ÉþÌ×±ØÐëµÈ³¤ |
C£®Í¬Ò»´ÎʵÑéÁ½´ÎÀϸÉþÌ×Ðëʹ½áµãµ½´ïͬһλÖà |
D£®ÓòâÁ¦¼ÆÀÁ½¸öϸÉþÌ×ʱ£¬Á½ÀÁ¦¼Ð½ÇÔ½´óÔ½ºÃ |
¢ÙÔÚÖ½´øÉÏ´òϼÇÊýµã5ʱµÄËÙ¶Èv = m/s£»
¢ÚÔÚ´òµã0~5¹ý³ÌÖÐϵͳ¶¯ÄܵÄÔöÁ¿¡÷EK= J£¬ÏµÍ³ÊÆÄܵļõÉÙÁ¿¡÷EP = J£¬Óɴ˵óöµÄ½áÂÛÊÇ £»
¢ÛÈôijͬѧ×÷³öͼÏñÈçͼ£¬Ôòµ±µØµÄʵ¼ÊÖØÁ¦¼ÓËÙ¶Èg = m/s2¡£