±à¼£º
2015-09-21
µÚ¢ò¾í(·ÇÑ¡ÔñÌâ¡¡¹²60·Ö)
¶þ¡¢Ìî¿ÕÌâ(¹²3СÌ⣬ÿСÌâ6·Ö£¬¹²18·Ö¡£°Ñ´ð°¸Ö±½ÓÌîÔÚºáÏßÉÏ)
11.ijÎïÀíÐËȤС×éΪ»ñµÃµ±µØÖØÁ¦¼ÓËÙ¶ÈÖµ£¬Éè¼ÆÁËÈçÏÂʵÑ飬²¢½øÐÐÁËϵÁÐ̽¾¿¹ý³Ì£¬¼ÙÉèÄãÒ²ÊÇÆäÖÐÒ»Ô±£¬Çë²¹³äÍêÕûºáÏß²¿·ÖÄÚÈÝ£º
(1)²Ù×÷¹ý³Ì;¢Ù½«´òµã¼ÆʱÆ÷¹Ì¶¨ÔÚÌú¼Ų̈ÉÏ£¬ÈçͼËùʾ;
¢Ú½«½ÓÓÐÖØÎïµÄÖ½´øÑØÊúÖ±·½Ïò´©¹ý´òµã¼ÆʱÆ÷µÄÏÞλ¿×;
¢ÛÏÈ________£¬ÔÙÊÍ·ÅÖ½´ø;
¢Ü»ñµÃµã¼£ÇåÎúµÄ¼¸ÌõÖ½´ø
(2)̽¾¿¹ý³Ì£ºÆäÖÐÒ»ÌõÖ½´øµÄµã¼£¼°Êý¾ÝÈçͼËùʾ¡£(ͼÖÐÖ±³ßµÄµ¥Î»Îªcm£¬µãOΪֽ´øÉϼǼµ½µÄµÚÒ»µã£¬µãA¡¢B¡¢C¡¢D……ÒÀ´Î±íʾµãOÒÔºóÁ¬ÐøµÄ¸÷µã¡£ÒÑÖª´òµã¼ÆʱÆ÷ÿ¸ôT=0.02s´òÒ»¸öµã)
¢ÙС×é³ÉÔ±Á¿³öDF¼äµÄ¾àÀëΪ3.60cm£¬¼ÆËã³ö´òµã¼ÆʱÆ÷´òϵãEʱµÄËÙ¶ÈvE=________m/s;
¢ÚС×é³ÉÔ±Á¿³öFH¼äµÄ¾àÀëΪ5.20cm£¬¼ÆËã³ö´òµã¼ÆʱÆ÷´òϵãGʱµÄËÙ¶ÈvG=________m/s;
¢ÛÀûÓÃg=vG-vEΔtµÃ³ög=________m/s2;
¢ÜÀûÓÃa=xFH-xDFt2µÃ³ög=________m/s2¡£
´ð°¸£º(1)½ÓͨµçÔ´¡¡(2)¢Ù0.90¡¡¢Ú1.30¡¡¢Û10.00
¢Ü10.00
½âÎö£º(1)´òµã¼ÆʱÆ÷ÔÚÖ½´øÉÏ´òµãʱӦÏÈ¿ªµçÔ´£¬´òµãÎȶ¨ºóÔÙÊÍ·ÅÖ½´ø¡£
(2)VE=XDF2T=3.60×10-20.04m/s=0.90m/s
VG=XFH2T=5.20×10-20.04m/s=1.30m/s
g=VG-VEΔt=1.30-0.900.04m/s2=10m/s2
12.Ò»¸öСÇòÑØбÃæÏòÏÂÔ˶¯£¬ÓÃÿ¼ä¸ô1/10sÆعâÒ»´ÎµÄƵÉÁÏà»úÅÄÉ㲻ͬʱ¿ÌСÇòλÖõÄÕÕƬ£¬ÈçͼËùʾ£¬¼´ÕÕƬÉϳöÏÖµÄÏàÁÚÁ½¸öСÇòµÄÏñÖ®¼äµÄʱ¼ä¼ä¸ôΪ1/10s£¬²âµÃСÇòÔÚ¼¸¸öÁ¬ÐøÏàµÈʱ¼äÄÚλÒÆ(Êý¾Ý¼ûϱí)£¬Ôò
s1 s2 s3 s4
8.20cm 9.30cm 10.40cm 11.50cm
(1)СÇòÔÚÏàÁÚµÄÏàµÈʱ¼äÄÚµÄλÒƲî________(Ìî“ÏàµÈ”»ò“²»ÏàµÈ”)£¬Ð¡ÇòµÄÔ˶¯ÐÔÖÊÊô________Ö±ÏßÔ˶¯¡£
(2)Óмס¢ÒÒÁ½Í¬Ñ§¼ÆËãСÇò¼ÓËٶȷ½·¨ÈçÏ£º
¼×ͬѧ£ºa1=s2-s1T2£¬a2=s3-s2T2£¬a3=s4-s3T2£¬
a=a1+a2+a33;ÒÒͬѧ£ºa1=s3-s12T2£¬a2=s4-s22T2£¬
a=a1+a22¡£
ÄãÈÏΪ¼×¡¢ÒÒÖÐÄÄλͬѧ¼ÆËã·½·¨¸ü׼ȷ?______¡£¼ÓËÙ¶ÈֵΪ________¡£
´ð°¸£º(1)ÏàµÈ¡¡ÔȼÓËÙ¡¡(2)ÒÒ¡¡1.1m/s2
½âÎö£º(1)ÓɱíÖÐÊý¾Ý¿ÉÖª£º
s2-s1=s3-s2=s4-s3=1.1cm
˵Ã÷СÇòÊÇ×öÔȼÓËÙÖ±ÏßÔ˶¯¡£
(2)ΪÁ˼õСÎó²î£¬¼ÆËãʱӦÓõ½¾¡¿ÉÄܶàµØ²âÁ¿ÊýÖµ£¬¼×ͬѧµÄ¼ÆËã·½·¨½á¹ûÊÇa=s4-s13T2
Ö»ÓÃs1¡¢s4Á½Öµ£¬ÒÒͬѧµÄ¼ÆËã·½·¨½á¹ûÊÇa=s3+s4-s1-s24T2=1.1m/s2£¬Îó²îСһЩ¡£
13.Èçͼ¼×ÊÇ“Ñо¿ÔȱäËÙÖ±ÏßÔ˶¯”ʵÑéÖлñµÃµÄÒ»ÌõÖ½´ø£¬O¡¢A¡¢B¡¢C¡¢DºÍEΪֽ´øÉÏÁù¸ö¼ÆÊýµã£¬¼ÓËٶȴóСÓÃa±íʾ¡£
(1)OD¼äµÄ¾àÀëΪ________cm¡£
(2)ÈçͼÒÒÊǸù¾ÝʵÑéÊý¾Ý»æ³öµÄx-t2ͼÏß(xΪ¸÷¼ÆÊýµãÖÁͬһÆðµãµÄ¾àÀë)£¬Ð±Âʱíʾ________£¬Æä¼ÓËٶȴóСΪ________m/s2(±£ÁôÈýλÓÐЧÊý×Ö)¡£
´ð°¸£º(1)1.20¡¡(2)¼ÓËٶȵÄÒ»°ë(»òa2)¡¡0.930
½âÎö£ºÓÉͼ¼×Dµã¶ÔÓ¦µÄÊýÖµ¿ÉÒÔ¶Á³öODÖ®¼äµÄ¾àÀëΪ1.20cm¡£ÎïÌå×öÔȱäËÙÖ±ÏßÔ˶¯£¬Î»ÒƺÍʱ¼äÖ®¼äµÄ¹ØϵΪx=v0t+12at2£¬¿É¼ûÔÚx-t2ͼÏóÖеÄбÂʱíʾ¼ÓËٶȵÄÒ»°ë£¬¿ÉµÃ¼ÓËÙ¶ÈΪ0.930m/s2¡£
Èý¡¢ÂÛÊö¡¢¼ÆËãÌâ(±¾Ìâ¹²4СÌ⣬¹²42·Ö¡£½â´ðӦд³ö±ØÒªµÄÎÄ×Ö˵Ã÷¡¢·½³ÌʽºÍÖØÒªÑÝËã²½Ö裬ֻд³ö×îºó´ð°¸²»Äܵ÷֣¬ÓÐÊýÖµ¼ÆËãµÄÌ⣬´ð°¸ÖбØÐëÃ÷ȷд³öÊýÖµºÍµ¥Î»)
14.(9·Ö)Æû³µÓɾ²Ö¹¿ªÊ¼ÔÚƽֱµÄ¹«Â·ÉÏÐÐÊ»£¬0¡«60 sÄÚÆû³µµÄ¼ÓËÙ¶ÈËæʱ¼ä±ä»¯µÄͼÏßÈçͼËùʾ¡£
(1)»³öÆû³µÔÚ0¡«60 sÄÚµÄv-tͼÏß;
(2)ÇóÔÚÕâ60 sÄÚÆû³µÐÐÊ»µÄ·³Ì¡£
´ð°¸£º(1)ÈçͼËùʾ¡£¡¡(2)900m
½âÎö£º±¾Ì⿼²éÁËÔ˶¯Ñ§Í¼ÏóÎÊÌâ¡£
(1)Éèt=10s,40s,60sʱ¿ÌµÄËٶȷֱðΪv1£¬v2£¬v3¡£
ÓÉͼ֪0¡«10sÄÚÆû³µÒÔ¼ÓËÙ¶È2m•s-2ÔȼÓËÙÐÐÊ»£¬ÓÉÔ˶¯Ñ§¹«Ê½µÃ
v1=2×10m/s=20m/s ¢Ù
ÓÉͼ֪10¡«40sÄÚÆû³µÔÈËÙÐÐÊ»£¬Òò´Ë
v2=20m/s ¢Ú
ÓÉͼ֪40¡«60sÄÚÆû³µÒÔ¼ÓËÙ¶È1m•s-2ÔȼõËÙÐÐÊ»£¬ÓÉÔ˶¯Ñ§¹«Ê½µÃ
v3=(20-1×20)=0 ¢Û
¸ù¾Ý¢Ù¢Ú¢Ûʽ£¬¿É»³öÆû³µÔÚ0¡«60sÄÚµÄv-tͼÏß¡£
(2)ÓÉËÙ¶ÈͼÏß¿ÉÖª£¬ÔÚÕâ60sÄÚÆû³µÐÐÊ»µÄ·³ÌΪ
x=30+602×20m=900m ¢Ü
15.(10·Ö)ÈçͼËùʾ£¬ ijͬѧ²â³öÒ»¿ÃÆ»¹ûÊ÷Ê÷¸É²¿·ÖµÄ¸ß¶ÈԼΪ1.6m£¬Ò»¸öÆ»¹û´ÓÊ÷¹Ú¶¥¶ËµÄÊ÷ÉÒÉÏÓÉÓÚÊܵ½ÈŶ¯¶ø×ÔÓÉÏÂÂ䣬¸Ãͬѧ²â³öÆ»¹û¾¹ýÊ÷¸ÉËùÓõÄʱ¼äΪ0.2s£¬ÖØÁ¦¼ÓËÙ¶ÈÈ¡10m/s2£¬Ôò£º
(1)Æ»¹ûÊ÷Ê÷¹Ú²¿·ÖµÄ¸ß¶ÈԼΪ¶àÉÙ?
(2)Æ»¹ûÂäµØʱµÄËÙ¶ÈΪ¶à´ó?
´ð°¸£º(1)2.45m¡¡(2)9m/s
½âÎö£º(1)ÉèÊ÷¹Ú¸ß¶ÈΪh1£¬Ê÷¸É¸ß¶ÈΪh2£¬Æ»¹û´Ó¶¥²¿ÏÂÂäµ½Ê÷¸É¶¥²¿µÄËÙ¶ÈΪv0£¬Ôò
h2=v0t+12gt2
µÃ£ºv0=7m/s
ÓÖ£ºv20=2gh1£¬µÃh1=2.45m
(2)ÉèÊ÷µÄ×ܸ߶ÈΪH£¬Æ»¹ûÂäµØµÄËÙ¶ÈΪv1
v21=2gH¡¡H=h1+h2=4.05m¡¡µÃv1=9m/s
±êÇ©£º¸ßÒ»ÎïÀíͬ²½Á·Ï°
ÍþÁ®Ï£¶ûapp (51edu.com)ÔÚ½¨Éè¹ý³ÌÖÐÒýÓÃÁË»¥ÁªÍøÉϵÄһЩÐÅÏ¢×ÊÔ´²¢¶ÔÓÐÃ÷È·À´Ô´µÄÐÅÏ¢×¢Ã÷Á˳ö´¦£¬°æȨ¹éÔ×÷Õß¼°ÔÍøÕ¾ËùÓУ¬Èç¹ûÄú¶Ô±¾Õ¾ÐÅÏ¢×ÊÔ