æ²æºä¸ä¸2007å±é«ä¸ç©çç´çº¿è¿å¨æ£æµé¢
å人åè¨ï¼ä»»ä½é®é¢é½æ解å³çåæ³ï¼æ æ³å¯æ³çäºæ¯æ²¡æçã ââç±è¿ªç
ä¸ãéæ©é¢ï¼å项ãå¤é¡¹éæ©é¢å4å°é¢ï¼å
±8å°é¢ï¼1-4为åéé¢ï¼æ¯å°é¢3åï¼5-8为å¤éé¢ï¼æ¯å°é¢4åãå
±è®¡28åï¼
1ï¼å¨ç 究ä¸è¿°è¿å¨æ¶ï¼è½æç©ä½çä½è´¨ç¹çæ¯ï¼ ï¼
Aï¼ç 究å°ççèªè½¬æåº
Bï¼ç 究ä¹ä¹ççæ转æåº
ããCï¼ç 究ç«è½¦ä»å京å°ä¸æµ·è¿è¡éè¦çæ¶é´
Dï¼ç 究ä¸åç«è½¦éè¿é¿æ±å¤§æ¡¥æéçæ¶é´
2ï¼æä½åå éç´çº¿è¿å¨çç©ä½ï¼è®¾å®è¿å¨å
¨ç¨çå¹³åé度æ¯v1ï¼è¿å¨å°ä¸é´æ¶å»çé度æ¯v2ï¼ç»è¿å
¨ç¨ä¸åä½ç½®æ¶çé度æ¯v3ï¼åä¸åå
³ç³»ä¸æ£ç¡®çæ¯ï¼ ï¼
ããAï¼v1ï¼v2ï¼v3ããBï¼v1ï¼v2=v3ããCï¼v1=v2ï¼v3ããDï¼v1ï¼v2=v3
3ï¼ä¸¤è¾å®å
¨ç¸åç汽车ï¼æ²¿æ°´å¹³ç´è·¯ä¸åä¸ååéè¡é©¶ï¼é度å为v0ï¼è¥å车çªç¶ä»¥æå®çå é度å¹è½¦ï¼å¨å®ååä½æ¶ï¼å车以å车å¹è½¦æ¶çå é度å¼å§å¹è½¦ãå·²ç¥å车å¨å¹è½¦è¿ç¨ä¸æè¡é©¶çè·¯ç¨ä¸ºsï¼è¥è¦ä¿è¯ä¸¤è½¦å¨ä¸è¿°æ
åµä¸ä¸ç¸æï¼å两车å¨åéè¡é©¶æ¶ä¿æçè·ç¦»è³å°åºä¸ºï¼ ï¼
Aï¼s Bï¼2s Cï¼3s Dï¼4s
4ï¼ä¸¤æ¨åèªå·¦åå³è¿å¨ï¼ç°ç¨é«éæå½±æºå¨åä¸åºçä¸å¤æ¬¡æå
ï¼è®°å½ä¸æ¨åæ¯æ¬¡æå
æ¶çä½ç½®ï¼å¦å¾1æ示ï¼è¿ç»ä¸¤æ¬¡æå
çæ¶é´é´éæ¯ç¸ççï¼ç±å¾å¯ç¥ï¼ ï¼
å¾1
Aï¼å¨æ¶å»t2以åæ¶å»t5两æ¨åé度ç¸å
Bï¼å¨æ¶å»t1两æ¨åé度ç¸å
Cï¼å¨æ¶å»t3åæ¶å»t4ä¹é´æç¬é´ä¸¤æ¨åé度ç¸å
Dï¼å¨æ¶å»t4åæ¶å»t5ä¹é´æç¬æ¶ä¸¤æ¨åé度ç¸å
5ï¼ç²ãä¹ãä¸ä¸äººåä¹ä¸ä¸ªçæ°çï¼ç²çè§æ¥¼æ¿å¨ä¸éï¼ä¹çè§ç²ãä¸é½å¨ä¸éï¼ä¸çè§ç²ãä¹é½å¨ä¸åï¼åç²ãä¹ãä¸ç¸å¯¹äºå°é¢çè¿å¨æ
åµå¯è½ï¼ ï¼
Aï¼ç²ãä¹ãä¸é½å¨ä¸å
Bï¼ç²ãä¹ä¸åï¼ä¸ä¸é
Cï¼ç²ãä¹ä¸åï¼ä¸éæ¢
Dï¼ç²ãä¸ä¸åï¼ä¹ä¸é
6ï¼ç©ä½ä½åå éç´çº¿è¿å¨ï¼å·²ç¥ç¬¬ 1sæ«çéåº¦æ¯ 6m/sï¼ç¬¬ 2sæ«çéåº¦æ¯ 8m/sï¼åä¸é¢ç»è®ºæ£ç¡®çæ¯ï¼ ï¼
ããAï¼ç©ä½çåéåº¦æ¯ 3m/sã ãBï¼ç©ä½çå éåº¦æ¯ 2m/s2
ããCï¼ä»»ä½1så
çé度ååé½æ¯2m/sã ãDï¼ç¬¬ 1så
çå¹³åéåº¦æ¯ 6m/s
7ï¼ä¸åé度åå é度å
³ç³»ç说æ³ï¼ æ£ç¡®çæ¯ï¼ ï¼
ããAï¼è¿å¨ç©ä½å¨æä¸æ¶å»çé度å¯è½å¾å¤§èå é度å¯è½ä¸ºé¶
ããBï¼è¿å¨ç©ä½å¨æä¸æ¶å»çé度å¯è½ä¸ºé¶èå é度å¯è½ä¸ä¸ºé¶
ããCï¼å¨åé度为æ£ãå é度为è´çååéç´çº¿è¿å¨ä¸ï¼é度å¯è½å¢å¤§
Dï¼å¨åé度为æ£ãå é度为æ£çååéç´çº¿è¿å¨ä¸ï¼å½å é度åå°æ¶ï¼å®çé度ä¹åå°
8ï¼å¦å¾2æ示çv-tå¾è±¡ä¸ï¼è¡¨ç¤ºç©ä½ä½ååéè¿å¨çæ¯ï¼ ï¼
å¾2
äºãå¡«ç©ºé¢ (5å°é¢ï¼9ã13å°é¢æ¯é¢3åï¼10-12å°é¢æ¯é¢4åãå
±è®¡18å)
ãã9ï¼è´¨ç¹ä»åæ åç¹O沿yè½´æ¹åè¿å¨å°yï¼4måï¼å沿xè½´è´æ¹åè¿å¨å°åæ 为ï¼-3ï¼4ï¼çBç¹ï¼åè´¨ç¹ä»Oè¿å¨å°Béè¿çè·¯ç¨æ¯________mï¼ä½ç§»å¤§å°æ¯_________mã
ãã10ï¼ç©ä½ä»éæ¢å¼å§ä½åå éç´çº¿è¿å¨ï¼ç¬¬2så
çä½ç§»æ¯6mï¼åå
¶å é度æ¯______m/s2ï¼5så
çä½ç§»æ¯________mï¼å®è¿å¨æå18mçæ¶é´æ¯______sï¼é度ä»6m/så¢å¤§å°10m/sæåççä½ç§»æ¯__________mã
ãã11ï¼ä¸è¾æ±½è½¦æ²¿å¹³ç´å
¬è·¯è¿å¨ï¼ä»¥é度v1ï¼25m/såééè¿å1/3è·¯ç¨ï¼ä»¥é度v2ï¼50m/séè¿å
¶ä½2/3è·¯ç¨ï¼å汽车å¨å
¨ç¨ä¸çå¹³åé度æ¯______m/sã
12ï¼æ人å¨å®¤å
以çªæ·ä¸ºèæ¯æå½±æ¶ï¼æ°å¥½æçªå¤ä»é«å¤è½ä¸çä¸å°ç³åæå¨ç
§çä¸ï¼å·²ç¥æ¬æ¬¡æå½±çæå
æ¶é´æ¯0.02sï¼éå¾ç
§çä¸çç³åè¿å¨ç迹çé¿åº¦ä¸º1.6mï¼å®é
é¿åº¦ä¸º100cmççªæ¡å¨ç
§çä¸çé¿åº¦ä¸º4.0cmï¼æ ¹æ®ä»¥ä¸æ°æ®ï¼ä½ ç¥éç³åæ¯ä»å¤é«çå°æ¹è½ä¸çåï¼_____
13ï¼ç¯®ç以10m/sçé度水平å°æå»ç¯®æ¿å以8m/sçé度ååå¼¹åï¼çä¸ç¯®æ¿çæ¥è§¦æ¶é´ä¸º0.1sï¼å篮çå¨æ°´å¹³æ¹åçå¹³åå é度为______m/s2ï¼æ¹å为_______ã
ä¸ãç§å¦æ¢ç©¶ä¸å®éªï¼3å°é¢ï¼å
±è®¡15åï¼
ãã14ï¼å¨æ¢ç©¶å°è½¦é度éæ¶é´ååè§å¾çå®éªä¸ï¼å°ä»¥ä¸æ¥éª¤ç代å·æåç顺åºå¡«ç©ºåå¨æ¨ªçº¿ä¸ï¼________ _____ã
ããï¼Aï¼æä½çº¸å¸¦ï¼å°å°è½¦ç§»è³é è¿æç¹è®¡æ¶å¨å¤ï¼å
æ¥éçµæºï¼åæ¾å¼çº¸å¸¦ï¼
ããï¼Bï¼å°æç¹è®¡æ¶å¨åºå®å¨å¹³æ¿ä¸ï¼å¹¶æ¥å¥½çµè·¯ï¼
ããï¼Cï¼æä¸æ¡ç»ç»³æ´å¨å°è½¦ä¸ï¼ç»ç»³è·¨è¿å®æ»è½®ï¼ä¸é¢åçéééå½çé©ç ï¼
ããï¼Dï¼æå¼çµæºï¼åä¸çº¸å¸¦ï¼
ããï¼Eï¼å°å¹³æ¿ä¸ç«¯æ¬é«ï¼è½»æ¨å°è½¦ï¼ä½¿å°è½¦æ°è½å¨å¹³æ¿ä¸ä½åéè¿å¨ï¼
ããï¼Fï¼å°çº¸å¸¦åºå®å¨å°è½¦å°¾é¨ï¼å¹¶ç©¿è¿æç¹è®¡æ¶å¨çéä½åï¼
ããï¼Gï¼æ¢ä¸æ°ç纸带ï¼åéå¤å两ä¸æ¬¡ã
15ï¼æå¦ççå®éªçº¸å¸¦å¦å¾3 ï¼åO为起å§è®¡æ°ç¹ï¼æ¯éç¸åæ¶é´Tç计æ°ç¹åå«ä¸ºAãBãCãDãEãFï¼æ¯ç¸é»ä¸¤ç¹é´è·ç¦»ä¾æ¬¡ä¸ºs1ãs2ãs3ãs4ãs5ãs6ï¼è¥åæ¯é3Tçæ¶é´è®¡ç®å é度ï¼åå¹³åå é度为________ã
å¾3
16ï¼æ次å®éªçº¸å¸¦çè®°å½å¦å¾4æ示ï¼å¾ä¸åå 个ç¹æ¨¡ç³ï¼å æ¤ä»Aç¹å¼å§æ¯æ5个ç¹å1个计æ°ç¹ï¼åå°è½¦éè¿Dç¹æ¶é度æ¯________m/sï¼å°è½¦è¿å¨çå é度æ¯________m/s2ãï¼æç¹è®¡æ¶å¨ççµæºé¢çæ¯50Hzï¼
å¾4
åã计ç®é¢ï¼5å°é¢ï¼å
±39åï¼
17ï¼ï¼7åï¼æ°´æ»´ä»å±æªä¸èªç±è½ä¸ï¼ç»è¿é«åº¦ä¸º1.8mççªæ·ï¼åæ¶0.2sãè¥ä¸è®¡ç©ºæ°é»åï¼gå10m/s2ï¼åå±æªç¦»çªé¡¶æå¤é«ï¼
18ï¼ï¼7åï¼é£æºçéå以6m/s2çå é度åååéç´çº¿è¿å¨ï¼è¥å
¶çéé度为60m/sï¼æ±å®çéå12så
æ»è¡çè·ç¦»ã
19ï¼ï¼7åï¼ä¸è´¨ç¹ç±éæ¢ä»Aç¹åºåï¼å
ä½åå éç´çº¿è¿å¨ï¼å é度大å°ä¸ºaï¼ååååéç´çº¿è¿å¨,å é度大å°ä¸º3aï¼é度为é¶æ¶å°è¾¾B ç¹ãAãBé´è·ç¦»ä¸ºsãæ±è´¨ç¹è¿å¨è¿ç¨ä¸çæ大é度ã
20ï¼ï¼9åï¼ä¸åç«è½¦åååéç´çº¿è¿å¨ï¼ä¸äººå¨è½¨éæè§å¯ç«è½¦çè¿å¨ï¼åç°å¨ç¸é»ç两个10så
ï¼å车ä»ä»è·ååå«é©¶è¿8èå6è车å¢ï¼æ¯è车å¢é¿8mï¼è¿æ¥å¤é¿åº¦ä¸è®¡ï¼ãæ±ï¼ ï¼1ï¼ç«è½¦çå é度a ï¼2ï¼æ¤äººå¼å§è§å¯æ¶ç«è½¦é度ç大å°
21ï¼ï¼9åï¼å®¢è½¦ä»¥20m/sçé度è¡é©¶ï¼çªç¶åç°æ£åæ¹120må¤æä¸è´§è½¦æ£ä»¥6m/sçé度åéåè¿ãäºæ¯å®¢è½¦ç´§æ¥å¹è½¦ï¼ä»¥0.8m/s2çå é度ååéè¿å¨ï¼è¯å¤æ两车æ¯å¦ç¸æï¼
é¶æ®µæ§å¦ä¹ æµè¯ï¼1--2ç« ï¼çæ¡
ä¸ãéæ©é¢
1ï¼C
åæï¼ç 究å°çåä¹ä¹ççèªè½¬æåºï¼ä¸è½å¿½ç¥å°ç大å°ï¼ABéï¼ å ç«è½¦é¿åº¦ç¸å¯¹äºå京å°ä¸æµ·çè·ç¦»èè¨å¯ä»¥å¿½ç¥ï¼æ
Cæ£ç¡®ï¼èç 究ç«è½¦éè¿æ¡¥çæ¶é´ï¼é¿åº¦ä¸è½å¿½ç¥ï¼æ
Déã
2ï¼C
åæï¼æ ¹æ®ååéç´çº¿è¿å¨çæ¨è®ºï¼å
¨ç¨çå¹³åé度çäºä¸é´æ¶å»çé度ï¼ä½é½å°äºä¸é´ä½ç½®çé度ãæ
éCã
3ï¼B
åæï¼å车å¹è½¦è¿å¨äºsï¼å车åæ¶ååéè¿å¨ï¼è¿å¨ä½ç§»ä¸º2s, å车å¹è½¦ä¹è¿å¨såä¸æ¥ï¼å好ä¸ç¸ææ¶ï¼åå¨åä¸ç¹ï¼æ
åéè¡é©¶æ¶ä¸¤è
è·ç¦»è³å°ä¸º2sã
4. C
åæï¼æ ¹æ®å¾ç¤ºå¯ç¥ï¼ä¸é¢çæ¨åååéè¿å¨ï¼å¨ä¸ä¸ªæ¶é´é´éå
è¿å¨äº4ä¸ªæ ¼ï¼ä¸é¢çæ¨åååå éè¿å¨ï¼æ ¹æ®æ段æ¶é´å
çå¹³åé度çäºè¿æ®µæ¶é´ä¸é´æ¶å»çé度å¯ç¥ï¼æ£ç¡®ççæ¡æ¯Cã
5ï¼ABC
åæï¼ç²çè§æ¥¼æ¿ä¸é说æç²å¨ä¸åï¼å·²çè§ç²å¨ä¸é说æå·²å¨ä¸åï¼ä¸çè§ç²ä¹ä¸å说æä¸ä¸éæéæ¢æä¸åçè¾æ
¢ãæ
æ£ç¡®çæ¯ABCã
ã 6ï¼BC
åæï¼ç¬¬ 1sæ«ä¸ç¬¬ 2sæ«çæ¶é´é´éæ¯1sï¼æ
å é度为2m/s2ï¼ä»»ä½1s å
çé度ååæ¯2m/s, ç©ä½çåé度æ¯4m/sï¼ç¬¬ 1så
çå¹³åé度æ¯5m/sãéBCã
7ï¼ABC
åæï¼å é度ä¸é度ä¹é´æ²¡æå¿
ç¶çèç³»ï¼æ
ABæ£ç¡®ï¼å½é度æ¹åå为åæ¹åæ¶ï¼é度è¶æ¥è¶å¤§ï¼æ
Cæ£ç¡®ï¼èä¸ï¼åªè¦é度ä¸å é度çæ¹åä¸è´ï¼ç©ä½å°±åå éè¿å¨ã
8ï¼BC
åæï¼é度大å°åå°çååéè¿å¨å°±æ¯ååéè¿å¨ï¼æ
éBCã
äºã填空é¢
9ï¼7mï¼5m
ç®è§£ï¼è·¯ç¨æ¯ç©ä½è¿å¨è½¨è¿¹çé¿åº¦ï¼æ
为7m, ä½ç§»å¤§å°æ¯ä»åä½ç½®æåæ«ä½ç½®ç线段é¿åº¦ï¼æ
为5mã
10ï¼4ï¼50ï¼3ï¼8
ç®è§£ï¼ç¬¬2så
çä½ç§»çäº1.5sæ¶å»çä½ç§»ï¼æ ¹æ®v=at解å¾a=4m/s2 æ ¹æ®ä½ç§»å
¬å¼å¾5så
ä½ç§»ä¸º50m, è¿å¨18mç»è¿çæ¶é´ä¸º3s, 6m/så¢å¤§å°10m/sæç¨æ¶é´ä¸º1sï¼æ
åççä½ç§»ä¸º8m.
11ï¼37.5
ç®è§£ï¼æ ¹æ®å¹³åé度çå®ä¹ï¼æ»ä½ç§»é¤ä»¥æ»æ¶é´å¾37.5m/s
12ï¼20m
ç®è§£ï¼æ ¹æ®æ¯ä¾å
³ç³»ç®åºå¨æå
æ¶é´å
ç³åè¿å¨çå®é
é¿åº¦ï¼æ±åºå¹³åé度ä½ä¸ºæå
ç¬æ¶çé度ï¼æ ¹æ®èªç±è½ä½è¿å¨çè§å¾æ±åºæ¶é´åä½ç§»ãä½ç§»ä¸º20m
13ï¼-180, ä¸åé度æ¹åç¸å
æ示ï¼æ ¹æ®å é度çå®ä¹æ±è§£ã-180,ä¸åé度æ¹åç¸åã
ä¸ãç§å¦æ¢ç©¶ä¸å®éª
14ï¼EBFCADG
15ï¼( s4+s5+s6-s3-s2-s1)/9T2
ç®æï¼æ ¹æ®é¢æè¥ä»¥3T为æ¶é´é´éï¼åå
±æ两个æ¶é´é´éï¼æ ¹æ®å
¬å¼Îx=aT2 å¾( s4+s5+s6)-ï¼s3-s2-s1ï¼=a(3T)2 è§£å¾ ( s4+s5+s6-s3-s2-s1)/9T2
16ï¼2.48ï¼6.18
ç®æï¼Dç¹çé度çäºCE段çå¹³åé度ï¼vD=(xOE-xOC)/2T, 解å¾vD =2.48m/sï¼æ ¹æ®å
¬å¼Îx=aT2解å¾a=6.18m/s2ã
åã计ç®é¢
17ï¼è§£ï¼è®¾å±æªç¦»çªé¡¶çé«åº¦ä¸ºh,ä¸è½æ¶é´ä¸ºt,å
h=gt2/2 â (2å)
h+Îh=g(t+0.2)2/2 â¡ (3å)
以ä¸ä¸¤å¼èç«è§£å¾ï¼ h=3.2m ⢠(2å)
18ï¼è§£ï¼é£æºçéååååéè¿å¨ï¼10sååæ¢è¿å¨ï¼åå2sæ¯éæ¢çã (2å)
æ
é£æºçä½ç§»æ¯ï¼ x=v0t+at2/2 â (3å)
å°â 代å
¥æ°å¼å¾: x =60m/sÃ10s-6m/s2Ã(10s)2/2=300m â¡ (2å)
19ï¼è§£ï¼è®¾è¿å¨è¿ç¨ä¸çæ大é度为v,å
â (4å)
解å¾ï¼ â¡ (3å)
20ï¼è§£ï¼ï¼1ï¼æ ¹æ®å
¬å¼ï¼Îx=aT2 å¾a=Îx/ T2 â (3å)
å°â 代å
¥æ°å¼å¾:a =0.16m/ s2 (1å)
ï¼2ï¼ç¬¬ä¸è车å¢ç»è¿æ¶çé度为1ã2车å¢çå¹³åé度ï¼å³
v=x/t=5.1m/s â¡ (2å)
å v=v0+at ⢠(1å)
å¾v0= v- at=3.5m/s ⣠(2å)
21ï¼åæï¼å®¢è½¦å追ä¸è´§è½¦æ¶ä¸¤è½¦é度ç¸çï¼å³å®¢è½¦é度æ°å¥½åå°ä¸è´§è½¦é度ç¸çãè¥æ¤æ¶ä¸¤è½¦ä½ç§»ç¸çåæ°å¥½ä¸ç¸æãè¥å®¢è½¦ä½ç§»å¤§äºè´§è½¦ä½ç§»åç¸æã
解ï¼è®¾å®¢è½¦å¹è½¦åç»tç§ä¸¤è½¦é度ç¸çï¼å³ï¼
V客â=V客+at â (2å)
V客â=Vè´§ â¡ (2å)
t = ⢠(2å)
æ¤æ¶ä¸¤è½¦è·ç¦»ï¼
S=Sè´§+S0S客= 617.5+120ï¼2017.5-0.817.52ï¼=-2.5m<0 ⣠(2å)
æ以两车ä¼ç¸æã (1å)
åèèµæï¼http://down3.shijuan.cn/2006/200604/20060413094734192.doc