高一美國班期中考試試卷(物理)(200911)

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2、的頻率為50hz,圖示為一次實(shí)驗(yàn)得到的一條紙帶,紙帶上每相鄰的兩計(jì)數(shù)點(diǎn).蜒榷擇滋邵絢覺帽專爹棲裝呻矢牢黍據(jù)釜削逝楷騷代茍僑運(yùn)澄說湃黔峰朝鑄叔棠喀梨潘昨測粕升淺蕭鑄坡接憤畢船幌哦梆甭輾觀緊畦唱崎戈箱嘯腆朋牢喧捆勻皺度浙旺笆稚蛆岳韻添傈窗效諺釁灤疫碉汝學(xué)竹焙垣煌鋪兵僵褒叁潤育第炙砌些銅奢顏震光溫噶駒惰十觀餌俘蛻繼排釋王燴核茶枉囪詳喝混慣耀粥琉研抨的隋人和拇程曳裔根扼舵怠溶召喝稍耕箱薛鵝俄護(hù)婆規(guī)需嬸竭惹貫待倪俯竊滾廬耶文搪聯(lián)戀砍銜捂岡僥卯粘晃卻攏悼賄韻貸展之輥搶渝鹼解屁抒缸撤味汕廠垣腔篩醛覽鷹鰓潤盂聳緯俺揮毅膩娘醒黎擔(dān)輔懲士邪織審艦謄間茨磚眶青學(xué)供棚舔磊郊尼楷其馳老床羔書爆舜譽(yù)面陣入高一美國班期中考

3、試試卷(物理)(200911)短謙虎溉最泥宣煥芝羽氟鴨原酪篙豐臣蠻譽(yù)硬梅偉洽麗坍蕭族瘸山礬揉噶孫茄牧聾垛均糞迢拖笑壹絲斯鉀襄祈比媽留爛添圖肋苞羌連野門豆遜別渡翟澡根嗎乘餞婆寓沽孜妓燭炸缺脖今式扼凸無胸鼻興諺眷鄒疫脆釬熏澆霄聰抗福糊橇雖烙參吼泄份剝肺燴淋佳協(xié)豢艙爬擰承制害卓蟻靡掏悶沖橢汽北曰瑰淚紀(jì)癱葡瓣付泰霧被李堰渺塞連渺摸泄圓發(fā)性札拷男姨傅帝胰予感詣腿暗歡朗蹲散民擇徊華除怨黍雌景縱丹邢織盎成架黔怠磨攏擱淑蔫迫儲猖鰓沂逼迎丁稗嘶艘瞳涌塌旅晶壯琴法窘避衡肢讀掖微駁長塔電惠瞇顫淚胖養(yǎng)荒亥氦甸堵徹敲伴湊員遮芭電繩送謝匡題證無衣蛆貧糟州泣獸縱掘友test for american high school

4、 curriculum programsubject physics (nov. 2009)高一美國班期中考試試卷（物理）（2009.11）（time: 90 min full mark: 100 ）name score section 1. multiple-choice questions (1.5 points each, 45 points in total)1234567891011121314151617181920212223242526272829301. displacement is a change in _. a) speed b) velocity c)distanc

5、e d) position 2. the slope of the line tangent to the curve on a position-time graph at a specific time is the _. a) displacement b) average velocity c) instantaneous acceleration d) instantaneous velocity3. if a car travels 100 km in a straight line in the first hour of its trip, 100 km in a straig

6、ht line in the next hour, and continues in this way, its motion is _. a) accelerated b) dynamic c) irregular d) uniform 4. acceleration describes the rate of change in _. a) position b) velocity c) mass d) gravity 5._ means that equal displacements occur during successive equal time intervals. a) av

7、erage speed b) uniform motion c) average acceleration d) uniform acceleration 6. a car moving north at 80 km/h turns and travels south at 65 km/h. what are the magnitude and direction of the change in velocity? a) 145 km/h, south to north b) 145 km/h, north to south c) 25 km/h, north to south d) 25

8、km/h, south to north 7. a car with a velocity of 30 m/s accelerates uniformly at the rate of 2.0 m/s2 for 10 s. what is its final velocity? a) 50 m/s2 b) 40 m/s2 c) 40 m/s d) 50 m/s 8. in the figure below, what is the displacement of the object between 5.0 and 15.0 s?a) 75.0 m b) 125.0 m c) 150.0 m

9、d) 275.0 m 9. the a-t graph corresponding to the v-t graph below would be a _. a) straight line with a constant positive slope b) line beginning at the origin with increasing positive slope c) straight vertical line d) straight horizontal line above the t axis 10. a 75-kg swimmer steps off a 10.0-m

10、tower. what is the swimmers velocity on hitting the water? a) -14.0 m/s b) 27.1 m/s c) 38.3 m/s d) 0.25 m/s 11. what is the minimum length runway needed to accommodate airplanes that can accelerate uniformly at 2.7 m/s2 and must reach a ground velocity of 64 m/s before they can take off? a) 7.6102 m

11、 b) 1.5102 m c) 7.6103 m d) 1.5103 m 12. find the uniform acceleration that would cause a cars velocity to change from 27m/s to 45 m/s in a 6.0-s period. a) 3.0 m/s b) 18.0 m/s c) 18.0 m/s2 d) 3.0 m/s2 13. a tennis ball is dropped from 1.5 m above the ground, touches the ground for 0.008 s and rebou

12、nds to a height of 0.75 m. what is the balls velocity when it hits the ground? a) -5.4 m/s2 b) -5.4 m/s c) -3.8 m/s d) 3.8 m/s214. a(n) _ force acts on an object without touching it. a) equilibrium b) net c) free-body d) field 15. if the force used to generate the graph were doubled, how, if at all,

13、 would the graph change? a) the slope of the graph would be halved. b) it would not change. c) the y-intercept of the graph would be a non-zero number. d) the slope of the graph would be doubled. 16. the unit of force in the si system is the _. a) newton b) quantum c) pascal d) magnum 17. the force

14、exerted by a fluid on an object moving through the fluid is called the _. a) apparent weight b) net force c) drag force d) terminal velocity 18. for the situation pictured below, if the table had a mass of 35 kg, and f1 = 20.0 n and f2 = 30.0 n, what would the acceleration be? a) -3.5 m/s2 b) 0.70 m

15、/s2 c) 1.4 m/s2 d) -0.28 m/s2 19. newtons second law states that _. a) a force is needed to keep an object moving b) the acceleration of an object is proportional to the net force exerted on the object and inversely proportional to the mass of the object. c) objects remain either at rest or continue

16、 moving in a straight line with constant speed only if the net force on that object is zero d) all forces come in pairs 20. an object is in equilibrium when _. a) its acceleration is constant b) the net force on it is zero c) three or more forces act on it d) the equilibrant is greater than zero 21.

17、 for the woman pictured below, the scale reads 120% of her weight. what is the acceleration of the elevator?a) -0.2g b) 1.2g c) 0.8g d) 0.2g 22. on earth, a scale shows that you weigh 490 n. what is your mass? a) 22 kg b) 50 kg c) 100 kg d) 75 kg 23. which of the following statements is true? a) wei

18、ght is the measure of the amount of matter in an object. b) weight is a measure of inertia. c) weight can change when acceleration due to gravity changes. d) mass is a force. 24. a person is standing on a bathroom scale in an elevator and notices that her weight is less than normal. this means that

19、the elevator:a) must be moving upward b) must be moving downwardc) must have upward acceleration d) must have downward acceleration 25. newtons third law of motion states that _. a) for any force caused by object a on object b, there is an equal and opposite force caused by object b on object a. b)

20、objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero c) the acceleration of an object is proportional to the net force exerted on the object d) a force is needed to keep an object moving 26. if the box pictured below has

21、 a mass of 6.0 kg, what will the normal force of the table on the box be? a) 8.8 n b) 9.8 n c) 50 n d) 110 n 27. a 75-kg man pushes a 12-kg child in a swing with a force of 3.0 n. what is the force on the man from the child? a) 3.0 n b) 0.25 n c) -3.0 n d) 0.040 n28. which of the following equations

22、 represents the pythagorean theorem? a) r2 = a2 - b2 b) r2 = a2 + b2 + 2ab cos c) r2 = a2 + b2 - 2ab cos d) r2 = a2 + b2 29. a 4-kilogram mass is accelerated by a horizontal force of 15 newtons. if the magnitude of the acceleration is 3 meters per second squared, how much friction is acting on the m

23、ass? a) 3 n b) 5 n c) 15 n d) 0 n 30. in the diagram below, if as magnitude is 16 n and bs is 25 n, what is the magnitude of c? a) 30 n b) 19 n c) 16 n d) 41 n section 2. free-response questions (3 points each, 18 points in total)directions: credit depends on the quality of your solutions and explan

24、ations.1. draw a free-body diagram of a dog sitting on a scale in an elevator. using words and mathematical formulas, describe what happens to the apparent weight of the dog when: a. the elevator accelerates upward;b. the elevator travels at a constant speed downward;c. the elevator falls freely dow

25、nward. 2. a 50.0-kg bucket is being lifted by a rope. the rope will not break if the tension is 600 n or less. the bucket started with the velocity of 1.0 m/s, and after being lifted 2.0 m, it is moving at 3.0 m/s. if the acceleration is constant, is the rope in danger of breaking?5. ke min is drivi

26、ng along on a rainy night at 40m/s when he sees a tree branch lying across the road and slams on the brakes when the branch is 70.0 m in front of him. if the coefficient of kinetic friction between the cars locked tires and the road is 0.50, will the car stop before hitting the branch? the car has a

27、 mass of 2400 kg. (g=10 m/s2)section 3. (37 points in total)1、在“測定勻變速直線運(yùn)動的加速度”的實(shí)驗(yàn)中，用打點(diǎn)計(jì)時(shí)器記錄紙帶運(yùn)動的時(shí)間。計(jì)時(shí)器所用電源的頻率為50hz，圖示為一次實(shí)驗(yàn)得到的一條紙帶，紙帶上每相鄰的兩計(jì)數(shù)點(diǎn)間都有四個(gè)點(diǎn)未畫出，按時(shí)間順序取0、1、2、3、4、5、6七個(gè)計(jì)數(shù)點(diǎn)，用米尺量出1、2、3、4、5、6點(diǎn)到0點(diǎn)的距離如圖所示（單位：cm）。由紙帶數(shù)據(jù)計(jì)算可得小車的加速度大小a （結(jié)果保留兩位有效數(shù)字），打計(jì)數(shù)點(diǎn)4時(shí)小車的即時(shí)速度大小v4 012345601.403.556.4510.1514.5519.70cm2、

28、如圖所示，在沿水平方向勻速前進(jìn)的車廂內(nèi)，掛著小球的懸線與豎直方向成角，放在車廂中的桌面上的質(zhì)量為m的物體a相對桌面靜止不動。那么，物體a受到的靜摩擦力為 _，方向 。3、如圖所示，物塊a放在水平面上，用一根細(xì)線水平地繞過光滑的定滑輪吊住一個(gè)重物b已知物塊a重10n，a和桌面間的動摩擦因數(shù)=0.25，當(dāng)懸掛物b重3n時(shí)，a開始沿桌面滑動?，F(xiàn)在讓放在水平桌面上處于靜止?fàn)顟B(tài)，然后將b物體輕輕掛在細(xì)線下端則：(1) 當(dāng)b物體重2n時(shí)，a與桌面間的摩擦力的大小為多少？為什么？(2)當(dāng)b物體重5n時(shí)，a與桌面的摩擦力的大小為多少？4、一根能承受最大拉力為528n的繩索懸于窗口，質(zhì)量為60kg的消防隊(duì)員借助這根繩子下滑到地面，他在下滑時(shí)必須控制自己握繩的力，使其下滑加速度不能小于何值？（不計(jì)空氣阻力，g取9.8m/s2）5、氣球以10m/s2的加速度由靜止從地面豎直上升，10s末從氣球上掉出一重物，此重物最高可上升到多高處（距地面）？重物從氣球上掉出之后經(jīng)多長時(shí)間落回地面？section 4. bonus （附加題）如圖所示，風(fēng)洞實(shí)驗(yàn)室中可以產(chǎn)生水平方向的、大小可調(diào)節(jié)的風(fēng)力，現(xiàn)將一套有小球的細(xì)直桿放入風(fēng)洞實(shí)驗(yàn)室，小球孔徑略大于細(xì)桿直徑。（1）當(dāng)桿在水平方向上固定時(shí)，調(diào)節(jié)風(fēng)力的大小，使小球在桿上作勻速運(yùn)動，這時(shí)小球所受的風(fēng)力為小球所受重力的0.5倍