ÌâÄ¿ÄÚÈÝ
18£®ÔÚ×ö¡°»¥³É½Ç¶ÈµÄÁ½¸ö¹²µãÁ¦µÄºÏ³É¡±µÄʵÑéÖУ¬Ö»ÓÃÒ»¸öµ¯»É³ÓÒ²¿ÉÒÔÍê³ÉÕâ¸öʵÑ飬ÏÂÃæµÄ¼¸¸öÓõ¥¸öµ¯»É³ÓÍê³ÉʵÑéµÄ˵·¨ÖУ¬ÕýÈ·µÄÊÇ£¨¡¡¡¡£©A£® | °ÑÁ½ÌõϸÏßÖеÄÒ»ÌõÓ뵯»É³ÓÁ¬½Ó£¬È»ºóͬʱÀ¶¯ÕâÁ½ÌõϸÏߣ¬Ê¹ÏðƤÌõÒ»¶ËÉ쳤µ½OµãλÖ㬶Á³ö³ÆµÄʾÊýF1ºÍF2µÄÖµ | |
B£® | °ÑÁ½ÌõϸÏßÖеÄÒ»ÌõÓ뵯»É³ÓÁ¬½Ó£¬È»ºóͬʱÀ¶¯ÕâÁ½ÌõϸÏߣ¬Ê¹ÏðƤÌõÒ»¶ËÉ쳤µ½OµãλÖ㬶Á³ö³ÆµÄʾÊýF1£»·Å»ØÏðƤÌõ£¬ÔÙ½«µ¯»É³ÓÁ¬½Óµ½ÁíÒ»¸ùϸÏßÉÏ£¬ÔÙͬʱÀÕâÁ½ÌõϸÏߣ¬Ê¹ÏðƤÌõÔÙÉ쳤µ½Oµã£¬¶Á³ö³ÆµÄʾÊýF2 | |
C£® | Óõ¯»É³ÓÁ¬½ÓÒ»ÌõϸÏßÀÏðƤÌõ£¬Ê¹ËüµÄÒ»¶ËÉ쳤µ½Oµã£¬¶Á³öF1£¬ÔÙ»»ÁíÒ»ÌõϸÏßÓ뵯»É³ÓÁ¬½ÓÀÏðƤÌõ£¬Ê¹ËüµÄÒ»¶ËÈÔÈ»É쳤µ½Oµã£¬¶Á³öF2 | |
D£® | °ÑÁ½ÌõϸÏßÖеÄÒ»ÌõÓ뵯»É³ÓÁ¬½Ó£¬È»ºóͬʱÀ¶¯ÕâÁ½ÌõϸÏߣ¬Ê¹ÏðƤÌõÒ»¶ËÉ쳤µ½OµãλÖ㬼ÇÏÂÁ½ÌõϸÏߵķ½Ïò¼°³ÆµÄʾÊýF1£¬·Å»ØÏðƤÌõ£¬ÔÙ½«µ¯»É³ÓÁ¬½Óµ½ÁíÒ»¸ùϸÏßÉÏ£¬ÔÙͬʱÀÕâÁ½ÌõϸÏߣ¬Ê¹ÏðƤÌõÔÙÉ쳤µ½Oµã£¬²¢Ê¹Á½ÌõϸÏßλÓڼǼÏÂÀ´µÄ·½ÏòÉÏ£¬¶Á³ö³ÆµÄʾÊýF2 |
·ÖÎö Ã÷È·ÌâÖиø³öµÄʵÑé»ù±¾ÔÀí£¬ÔÙ½áºÏ¡°Ì½¾¿ÇóºÏÁ¦µÄ·½·¨¡±µÄʵÑéÔÀíÒÔ¼°¾ßÌå²Ù×÷£¬È·¶¨ÕýÈ·µÄ²Ù×÷²½Ö裮
½â´ð ½â£ºÌ½¾¿Á¦µÄºÏ³ÉʵÑ飬¹Ø¼üҪȷ¶¨Á½¸ö·ÖÁ¦µÄ´óСºÍ·½Ïò£¬ÎªÁ˲úÉúÏàͬµÄ×÷ÓÃЧ¹û£¬ÏðƤÌõ±ØÐëÀµ½Í¬Ò»µãO£¬ÓÃÒ»¸ùµ¯»É³Ó×÷³öÁ½¸ö·ÖÁ¦µÄ´óСºÍ·½Ïò£¬Ðè·ÖÁ½´ÎʵÑ飬°ÑÁ½¸ùϸÏßÖеÄÒ»ÌõϸÏßÓ뵯»É³ÓÁ¬½Ó£¬È»ºóͬʱÀÕâÁ½ÌõϸÏߣ¬Ê¹ÏðƤÌõµÄÒ»¶ËÉ쳤µ½Oµã£¬¼ÇÏÂÁ½Ï¸Ïߵķ½Ïò¼°³ÓµÄʾÊýFl£»·Å»ØÏðƤÌõºó£¬½«µ¯»É³ÓÁ¬½Óµ½ÁíÒ»¸ùϸÏßÉÏ£¬ÔÙͬʱÀÕâÁ½ÌõϸÏߣ¬Ê¹ÏðƤÌõÒ»¶ËÉ쳤µ½Oµã£¬²¢Ê¹Á½ÌõϸÏßλÓڼǼÏÂÀ´µÄ·½ÏòÉÏ£¬¶Á³öµ¯»É³ÓµÄ¶ÁÊýΪF2£®¹ÊDÕýÈ·£¬A¡¢B¡¢C´íÎó£®
¹ÊÑ¡£ºD£®
µãÆÀ ±¾Ì⿼²é̽¾¿ºÏÁ¦µÄ·½·¨Óë¿Î±¾ÊµÑ鲻ͬ£¬¿Î±¾ÓÃÁ½¸ùµ¯»É³Ó£¬±¾ÊµÑéÓÃÒ»¸ùµ¯»É³Ó£¬µ«ÊÇʵÑéµÄÔÀíÏàͬ£®¶ÔÓÚÕâЩ»ù´¡ÊµÑéÐèͨ¹ýʵÑé½øÐÐÇÐÉíÌå»á£¬Í¬Ê±Ò²ÒªÍ¨¹ýÁ·Ï°¼ÓÉîÀí½â£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
8£®Èçͼ£¬Ñز¨µÄ´«²¥·½ÏòÉÏÓмä¾à¾ùΪ2mµÄÎå¸öÖʵ㣬¾ù¾²Ö¹ÔÚ¸÷×ÔµÄƽºâλÖã¬Ò»Áмòгºá²¨ÒÔ2m/sµÄËÙ¶ÈˮƽÏòÓÒ´«²¥£¬t=0ʱ¿Ìµ½´ïÖʵãa£¬Öʵãa¿ªÊ¼ÓÉƽºâλÖÃÏòÏÂÔ˶¯£¬t=3sʱÖʵãaµÚÒ»´Îµ½´ï×î¸ßµã£¬ÔÚÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£® | Öʵãd¿ªÊ¼Õñ¶¯ºóµÄÕñ¶¯ÖÜÆÚΪ4s | |
B£® | t=4sʱ¿ÌaµãÇ¡ºÃÒƶ¯µ½Öʵãe | |
C£® | t=5sʱ¿ÌÖʵãbµ½´ï×î¸ßµã | |
D£® | ÔÚ3s£¼t£¼4sÕâ¶Îʱ¼äÄÚÖʵãcËٶȷ½ÏòÏòÉÏ |
9£®ÔÚ¡°Ì½¾¿Ð¡³µËÙ¶ÈËæʱ¼ä±ä»¯µÄ¹æÂÉ¡±µÄʵÑéÖУ¬ÎªÁ˼õÉÙ²âÁ¿Îó²î£¬ÏÂÁдëÊ©ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£® | ʹС³µÔ˶¯µÄ¼ÓËٶȾ¡Á¿Ð¡Ò»Ð© | |
B£® | ʹС³µµÄÖÊÁ¿¾¡Á¿Ð¡Ò»Ð© | |
C£® | Ñ¡Óø÷´¦Æ½Õû³Ì¶È¡¢¹â»¬³Ì¶ÈÏàͬµÄ³¤Ä¾°å×öʵÑé | |
D£® | ÉáÈ¥Ö½´ø½ÏÃܵĵ㣬ѡȡÊʵ±µÄ¼ÆÊýµã½øÐвâÁ¿¼ÆËã |
3£®ÈçͼËùʾµÄ×°ÖÃÖУ¬Èô¹â»¬½ðÊôµ¼¹ìÉϵĽðÊô¸ËabÏòÓÒ·¢ÉúÒƶ¯£¬ÆäÔÒò¿ÉÄÜÊÇ£¨¡¡¡¡£©
A£® | ͻȻ½«S±ÕºÏ | B£® | ͻȻ½«S¶Ï¿ª | ||
C£® | S±ÕºÏ£¬Ôö´óRµÄ×èÖµ | D£® | S±ÕºÏ£¬¼õСRµÄ×èÖµ |
7£®Ä³ÎïÌåÓɾ²Ö¹¿ªÊ¼×öÖ±ÏßÔ˶¯£¬ÎïÌåËùÊܺÏÁ¦FËæʱ¼ätµÄ±ä»¯Í¼ÏóÈçͼËùʾ£¬ÏÂÁйØÓÚ¸ÃÎïÌåÔ˶¯Çé¿öµÄ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£® | ÎïÌåÔÚ2¡«4 sÄÚ×öÔȼÓËÙÖ±ÏßÔ˶¯ | |
B£® | ÎïÌåÔÚ4 sÄ©Àë³ö·¢µã×îÔ¶ | |
C£® | ÎïÌåÔÚ0-8sÄÚ×öÍù·µÔ˶¯ | |
D£® | ÎïÌåÔÚ0¡«4 sºÍÔÚ4¡«8 sÄÚµÄλÒÆÏàͬ |