人教版2018初二物理寒假作业答案

第一篇：人教版2018初二物理寒假作业答案

人教版2018初二物理寒假作业答案

初中寒假作业是不是一直困扰这你呢?不用担心，查字典物理网小编为你带来了人教版初二物理寒假作业答案啦，是不是很让你兴奋呢?那就快来看看吧!

1、B、2.45 2、28.2 25.1 3、2.5

4、人、河岸

5、运动

6、地面、地面、椅背、车

7、A

8、c

9、C

10、C

11、A

12、D、13、B

14、B l 2

1、长、短

2、每秒行驶5米 3、6.25 22.5 4、250 5/3

5、路程、时间、V=s/t 6、0.4 便于测量时间 7、100min

8、路程、时间、速度 9、6.25m/s 交接棒所用时间少 10、80 22.22 0.4511、8 6 大于

12、(1)v=s/t=300m/5h = 60 km/h(2)v=s/t=300m/2.5h=120 km/h(3)t =t1—t2 =5h—2.5h =2.5h l 3

1、振动、空气、山间铃响马帮来

2、不能、能

3、快

4、不相同、空气、耳朵

5、小于、波的、泡沫塑料屑在飞舞、在振动

6、C

7、C

8、C

9、音调、音色、音调、响度

10、频率、快慢、频率、高

11、次数 HZ 20---20000HZ

12、强弱、振幅、振幅、大、远近

13、分贝、90dB

14、慢、低、大、大

15、音色、响度

16、信息、能量

17、C

18、B

19、C 20、A l 4

1、A

2、C

3、A

4、A

5、A

6、C

7、空气柱、空气柱、频率、空气

8、(1)能量(2)音色、9、(1)无法正常交流(2)无法听音色(3)感受不到声音带来的信息

10、(1)声音可以在固体中传播(2)更好的接收声音(3)听诊器

l 5 1、36.4、=、体温计有缩口，水银不会回流

2、A：没有水平放置 B：正 C：接触了容器底 D：没有接触液体

3、甲、38.5 38.5

4、(1)10(2)是、有固定的凝固点

5、放、低

6、B

7、B

8、D

9、C

10、C

11、d a c b e

12、(1)温度保持不变、(2)温度继续上升、(3)图略

l 探究性学习

1、真空中不能传声

2、B

3、D 4、50 5*10000

5、D

6、折射、虚、火车、地面

7、A 8、11.268

9、吸、熔化、力、熔点

10、惯性、力

11、同意，水滴就像一个凸透镜，把阳光会聚，使树林燃烧，从而引起火灾。

12、因为衣服只能反射它原本的颜色。

13、测得十分钟的路程，用V=S/T的公式求出速度

l 6

1、液化、汽化

2、汽化、液化、液化、凝固、3、吸、不变、大、沸点、不同、增大

4、液化、放

5、汽化、吸 6、100℃、不变

7、(1)沸腾前，温度不断上升(2)沸腾时，温度保持不变

8、(1)98、不变(2)不是标准大气压

9、D

10、C

11、B

12、C

13、D 14、48 C

15、快、温度计、B、25

16、(1)0 继续吸热，温度保持不变、固液共存状态(2)没有加上盖子

l 7

1、熔化、升华、凝华

2、室内、凝华、放

3、升华、凝华、熔化、4、低、凝华、熔化吸热、5、C、6、A

7、B

8、D

9、C

10、B

11、B

12、液体的表面积、液体的温度、液体上方空气的流速

13、碘粉、碘粉、气体、气化碘、升华

14、液化、汽化

15、低、温度计、不同、冰箱、凝固

l 8

1、（4、5、7)（1、2、6)(3)

2、近、的直线传播

3、光的直线传播

4、法线、入射光线上、反射光线、AON、40、BON、40、80

5、（5、10、8、不变)

6、直线传播、反射

7、可逆

8、A

9、A

10、A、11、C

12、C

13、略

14、略

15、略

16、(1)红色，除红色以外的颜色(2)红光热效应强(3)反射白光，吸收白色以外的光

l 9

1、折射、反射

2、AO、2,、BO、3、CO、6

3、折射、反射

4、折射、虚、高、反射

5、左、偏折

6、B

7、C

8、C（9、10、11、12、13、略)

上文就是查字典物理网给您带来的人教版初二物理寒假作业答案，希望大家及时注意并了解相关动态！!

第二篇：(苏教版)初二上册物理寒假作业答案参考

（苏教版）初二上册物理寒假作业答案参考

初中寒假作业是不是一直困扰这你呢?不用担心，查字典物理网小编为你带来了(苏教版)初二上册物理寒假作业答案参考啦，是不是很让你兴奋呢?那就快来看看吧!

1、B、2.45 2、28.2 25.1 3、2.5

4、人、河岸

5、运动

6、地面、地面、椅背、车

7、A

8、c

9、C

10、C

11、A

12、D、13、B

14、B 2

1、长、短

2、每秒行驶5米 3、6.25 22.5 4、250 5/3

5、路程、时间、V=s/t 6、0.4 便于测量时间 7、100min

8、路程、时间、速度 9、6.25m/s 交接棒所用时间少 10、80 22.22 0.4511、8 6 大于

12、(1)v=s/t=300m/5h = 60 km/h(2)v=s/t=300m/2.5h=120 km/h(3)t =t1—t2 =5h—2.5h =2.5h 3

1、振动、空气、山间铃响马帮来

2、不能、能

3、快

4、不相同、空气、耳朵

5、小于、波的、泡沫塑料屑在飞舞、在振动

6、C

7、C

8、C

9、音调、音色、音调、响度

10、频率、快慢、频率、高

11、次数 HZ 20---20000HZ

12、强弱、振幅、振幅、大、远近

13、分贝、90dB

14、慢、低、大、大

15、音色、响度

16、信息、能量

17、C

18、B

19、C 20、A 4

1、A

2、C

3、A

4、A

5、A

6、C

7、空气柱、空气柱、频率、空气

8、(1)能量(2)音色、9、(1)无法正常交流(2)无法听音色(3)感受不到声音带来的信息

10、(1)声音可以在固体中传播(2)更好的接收声音(3)听诊器 1、36.4、=、体温计有缩口，水银不会回流

2、A：没有水平放置 B：正 C：接触了容器底 D：没有接触液体

3、甲、38.5 38.5

4、(1)10(2)是、有固定的凝固点

5、放、低

6、B

7、B

8、D

9、C

10、C

11、d a c b e

12、(1)温度保持不变、(2)温度继续上升、(3)图略 探究性学习

1、真空中不能传声

2、B

3、D 4、50 5*10000

5、D

6、折射、虚、火车、地面

7、A 8、11.268

9、吸、熔化、力、熔点

10、惯性、力

11、同意，水滴就像一个凸透镜，把阳光会聚，使树林燃烧，从而引起火灾。

12、因为衣服只能反射它原本的颜色。

13、测得十分钟的路程，用V=S/T的公式求出速度

1、液化、汽化

2、汽化、液化、液化、凝固、3、吸、不变、大、沸点、不同、增大

4、液化、放

5、汽化、吸 6、100℃、不变

7、(1)沸腾前，温度不断上升(2)沸腾时，温度保持不变

8、(1)98、不变(2)不是标准大气压

9、D

10、C

11、B

12、C

13、D 14、48 C

15、快、温度计、B、25

16、(1)0 继续吸热，温度保持不变、固液共存状态(2)没有加上盖子

1、熔化、升华、凝华

2、室内、凝华、放

3、升华、凝华、熔化、4、低、凝华、熔化吸热、5、C、6、A

7、B

8、D

9、C

10、B

11、B

12、液体的表面积、液体的温度、液体上方空气的流速

13、碘粉、碘粉、气体、气化碘、升华

14、液化、汽化

15、低、温度计、不同、冰箱、凝固

以上就是查字典物理网为大家整理的(苏教版)初二上册物理寒假作业答案参考，怎么样，大家还满意吗?希望对大家的学习有所帮助，同时也祝大家学习进步，考试顺利!

第三篇：初二寒假作业答案2013（范文模版）

初二寒假作业答案2013 初二上期（2012～2013）寒假作业答案

一：DCADCB

二：

7．（！）25（2）根号二2（3）26（4）9倍根号2（5）3分之根号3k

（6）60

8．6cm 48cm

9.169

10.3或7

11.10步

12.25cm

一：BDBCAB

二：

7．90 度

8． 5

9.8 4.8

10.120cm

11．17cm

12．（1）84 85

(2)以这些数为边的都是三角形

三角形的最短直角边的平方等于斜边与直角边的和

（三）一：BBBCBCBC

二：

9．（1）12

（2）16

（3）14 7倍根号3

（4）5倍根号2

10．60/13

11.30

12．S1=s2=s3

13．5

14．6

15．根号3：2

16．2≦x≦6

（四）一：BDBDBC

二：

7．8 6 70度 110度

8．8cm 12cm

9．55度 125度 125度

10.12

11.1.5 3 7.5 7.5

12．26度 120度

13．16

14.20

(五)一：BCCDCA

二：

7.8 6

8． 2

9． 两 □ABCD AB∥DC AB =BC

□CDEF AB=CD=EF DE=CF

第四篇：初二寒假作业答案2013

一、单项选择(共20小题，每小题l分，计20分)

从A、B、C、D、四个选项中选出一个可以填入句中空白处的最佳答案。

1.____ one-hour documentary takes ____ close look at the life of giant pandas in Wolong.A.An, a B.The, a C.The, / D.A, the

2.I don’t mind _______ scared, so I’ve made up my mind ______ the horror film.A.feeling, to watch B.feeling, watching C.to feel, to watch D.to feel, watching

3.There are always ______ interesting stories in the series that _____ many people watch them.A.such, so B.such, such C.so, so D.so, such 4._______ Millie was watching TV, Eddie was sleeping.A.While B.When C.As D.Since

5.Jim plays football _________ than his brother.A.more badly B.worst C.more hardly D.better 6.Very ________ people like this programe.A.few B.a few C.little D.a little

7.Nancy argued ______ Victor _____ what TV programme to watch.A.with, about B.with, for C.to, about D.to, for

8.Not only my friend but also I ______ interested in action films.We often see films together.A.be B.am C.is D.are

9.You _________ to eat snacks in the classroom.A.shouldn’t B.had better not C.oughtn’t D.needn’t

10.You have to keep quiet while watching the film, _______ you?

A.haven’t B.don’t C.didn’t D.will

11.What’s _________ at the cinema? Which isn’t suitable for the blank(空白处)? A.on B.in C.shown D.showing

12.The murder happened _______ between nine and eleven last night.A.sometime B.sometimes C.some time D.some times 13.—Have you ever seen the movie called Los Angles 2011? —Yes, but I think it’s ______.I fell asleep when I saw it.A.exciting B.boring C.bored D.excited

14.The number of chairs in the room __ ten.I’m afraid a number of chairs in the room ___ lost.A.is;is B.is;are C.are;is D.are;are

15.He was last seen _________in his office at about 7:15 p.m..A.work B.working C.to work D.worked

16.The police are planning to _________ the drawings of the suspect.A.put on B.put up C.put away D.put off 17.—What did your father ask you? —He asked me ___________.A.whom I was chatting with B.where am I with my friends C.when would I go home D.if I have finished my homework 18.The girl devoted all her time she had ______ others.A.to help B.helping C.helped D.to helping

19.一I am out of breath.I can’t go any further.一 _______!I am sure you can make it.A.No problem B.What a pity C.Not bad D.Come on

20.－Could you look after my daughter for me while I’m away? －___________.A.Yes, here you are B.You’re welcome C.Yes, please D.With pleasure

二、完形填空(共15小题；每小题l分，计15分)

阅读下面的短文，掌握其大意，然后从各题所给的四个选项中选出一个最佳答案。I really only meant it as a joke.I wasn't trying to steal anything honestly.My friend Matthew started bringing his new cell phone to class last week.He was walking around bragging(吹嘘)about it to everyone.He was saying, “My cell phone can download the newest 21 off the Internet.”Then he 22 everyone by downloading a game and starting to play it.The pictures and sound were really 23.class, he would use his cell phone to watch TV.The rest of us didn't have a phone like 25 , so we had to crowd(拥挤)around him.I was just trying to see the screen, 26 there were so many other kids that I could not see it clearly.I was getting rea lly jealous.But then yesterday, he forgot his cell phone at the end of class.He left it right on his desk.27 noticed it was there except me.I decided to teach him a lesson.I took his phone quietly off the desk, and put it in my own bag.My 28 was to give it back to him the next day.I 29 wanted to see his reaction(反应).Maybe he would stop being such a show-off.But this morning he rushed into class, screaming and yelling(吼叫).He was very 30 and almost mad.He started accusing(指责)different people of 31 his phone, but I had it in my 32 the whole time.He even started fighting with another classmate 33 Matthew was sure that person had taken it.The teacher sent them to the headmaster's office.They 34 got in a lot of trouble.Now I don't know what to 35!If I tell him that I took the cell phone, he'll think I stole it.If I don't tell him, then I really did steal it.How did I get into such a trouble? 21.A.ads B.songs C.films D.games 22.A.gave B.showed C.lent D.asked 23.A.good B.bad C.noisy D.unclear 24.A.After B.During C.In D.From 25.A.hers B.ours C.his D.theirs 26.A.and B.but C.then D.so

27.A.Everybody B.Somebody C.Anybody D.Nobody 28.A.plan B.suggestion C.dream D.action 29.A.always B.hardly C.just D.sometimes 30.A.happy B.quiet C.sad D.a ngry 31.A.losing B.stealing C.playing D.using 32.A.desk B.hand C.bag D.pocket 33.A.if B.because C.until D.though 34.A.both B.all C.neither D.none 35.A.say B.take C.see D.do

三、阅读理解。

A.阅读下列短文，从每小题所给的A、B、C、D四个选项中选出一个最佳答案。(共l5小题，每小题2分，计30分)A

Watching movies for your summer

Pirates of the Caribbean: Dead Man’s Chest 加勒比海盗：聚魂棺 Captain Jack Sparrow again appears on the screen.This time, he finds himself in a heavy debt(债)to Davy Jones.The only way to get out of it is to find the Dead Man’s Chest.He asks his old fiends for help and they start out to the sea.Garfield: A Tale of Two Kitties 加菲猫: 双猫记

Hello, Garfield will meet you again on the screen.This time, America’s favourite cat Garfield travels to London.Garfield gets lost on the way.However, he enjoys his new life in his new home.But danger is near him… Superman Returns 超人归来

How exciting it is to see Superman on the screen again!Like before, he is again saving the world.But his enemy, Lax Luther, is still planning to kill him so that he can control the world.36.What does the underlined word “it” refer to? A.His debt.B.His old friend.C.His new life.D.The Dead Man’s Chest.37.Which of the following doesn’t happen to Garfield?

A.He gets lost.B.He has his new home and enjoys his new life.C.Danger is waiting for him.D.He is in a heavy debt.38.Why does Lax Luther plan to kill Superman? A.Because he wants to save the world.B.Because he wants to enjoy his new life.C.Because he wants to control the world.D.Because he wants to control Superman.B

After Mr.and Ms.Smith spent a happy morning at the zoo with Joe, their four-year-old grandson, they stopped at a restaurant and then went into it for lunch.When the waiter passed them some menus，Mr.Smith reached into his pocket for his glasses.He was disappointed(失望的)to find that they were lost.“I know where your glasses are, Grandpa, ” said the grandson.“Where?” asked Mr.Smith happily.“They are at the zoo.” Joe answered.“When you took me off the train near the elephants，they fell out of your pocket.”

Mr．Smith was a little angry and he asked，“Joe，if you saw my glasses fall out of my shirt，why didn’t you tell me?”

“Well，Grandpa,” said Joe, “after you put your foot on them, I didn’t think you wanted them any more.”

39.The glasses fell out of the pocket when ________.A.Mr.Smith got into the zoo

B.Mr.Smith hurried into the restaurant

C.Joe was taken off the train near the elephants

D.they were getting on the train

40.“Menu” in the article means___________ in Chinese.A.账单 B.订单 C.菜单 D.名单

41.Which of the following is TRUE?

A.Joe didn’t know where his grandpa's glasses were.B.Mr.Smith didn’t get his glasses back at last.C.Mr.Smith got his glasses back at last.D.Mr.Smith was glad with what his grandson did.C

My teenage son Karl became withdrawn after his father died.As a single parent, I tried to do my best to talk to him.But the more I tried, the more he pulled away.When his report card arrived during his junior year, it said that he had been absent(缺席的)95 times from classes and had six falling grades for the year.At this rate he would never graduate(毕业), I sent him to the school adviser, and I even begged(乞求)him.Nothing worked.One night I felt so powerless that I got down on my knees(膝盖)and pleaded(恳求)for help.“Please God, I can’t do anything more for my son.I’m at the end of my rope(绳子).I’m giving the whole thing up to you.”

I was at work when I got a phone call.A man introduced himself as the headmaster.“I want to talk to you about Karl’s absences.” Before he could say another word, I choked up and all my disappointment and sadness over Karl came pouring out into the ears of this stranger.“I love my son but I just don’t know what to do.I’ve tried everything to get Karl to go back to school and nothing has worked.It’s out of my hands.“For a moment there was silence on the other end of the line.The headmaster seriously said, “Thank you for your time”, and hung up.Karl’s next report card showed a marked improvement in his grades.Finally, he even made the honor roll.In his fourth year, I attended a parent-teacher meeting with Karl.I noticed that his teachers were astonished at the way he had turned himself around.On our way home, he said, “Mum, remember that call from the headmaster last year?” I nodded.“That was me.I thought I’d play a joke but when I heard what you said, it really hit me how much I was hurting you.That’s when I knew I had to make you proud.”

42.Which of the following has the similar meaning to the underlined word “withdrawn”? A.Quiet and lonely.B.Relaxed and excited.C.Active and lively.D.Happy and easy-going.43.When the mother said “It’s out of my hands” to the headmaster, she meant that she _______.A.didn’t know what to do about her son B.would drive her son away from the house C.had no money to support the family D.would have to hang up 44.Who was it that telephoned Karl’s mother that day? A.The headmaster B.The school adviser C.Karl himself D.The passage doesn’t tell us 45.From the passage we can learn that ______.A.children in single-parent families always have mental problems

B.mother’s love plays an important role in teenagers’ life

C.parents should give their children everything that they need

D.school education still works well without the support from parents D

Microblog(微博)is used by more and more people in China.Do you know what it is?

Micorblog makes the people around the world to know each other better.It helps people to find the information that they need more easily, also to get some information about the world they did not know before.Many famous people are using microblog now, including singers, TV hosts and artists.The first day of Chinese New Year in 2010，people on Sina Microblog sent 9873 microblogs to wish somebody a Happy New Year.Yao Chen became the queen(王后)of microblog because her microblog has over 1.3 million followers;Li Yuchun sent a microblog and got 11760 comments(评论)within 24 hours;Cai Kangyong, who is a famous TV host and famous writer in Taiwan, has 15143 more followers within 24 hours.Why is microblog so popular? The most important reason is that it is convenient(方便的).People need not use too much time to write the articles to express(表达)their feeling.They can write at most 140 words, and then send it through computers or mobile phones onto the microblog.As s oon as they send it, their followers will know.They can use it anytime, anywhere.Many of my friends use microblog to share things with others.They can talk about what they see, hear and think in a sentence or a photo.Also, they can follow their friends’ or their favorite stars’ microblogs.They can even join in any discussion of anything.Microblog is very hit now!

Have you microblog today?

46.According to the passage, ________________.A.microblog can make people around the world to know each other better

B.you can write as many words as you like in your microblog

C.microblog is not very popular in China

D.microblog is only used by people under 18

47.Yao Chen became the queen of microblog because _______________.A.she sent a microblog and got 11760 comments

B.she is a famous actress in China

C.her blog has over 1.3 million followers

D.she has 15143 more followers within 24 hours

48.Microblog is very popular.The most important reason is that ____________________.A.many famous people are using it now

B.it is convenient

C.people can share their photos with others D.people can join in any discussion

49.What can we do on the microblog?

A.We can join in any discussion of anything.B.We can only get some information about the world we had known before.C.We can write at least 140 words, and then send it through computers onto the microblog.D.We can get answers to any of our questions.50.We can probably find this article in _______________.A.a children’s story book B.a clothing magazine

C.a newspaper D.an exercise book 第Ⅱ卷（非选择题，55分）

B 阅读下列短文，根据短文内容完成表格中所缺信息，每空一词。(共l0题，每题l分，计l0分)We all need a healthy environment, but we produce waster every day and it does harm to our environment.Though we are young, we can still do something to help.In fact, even the simplest everyday activities can make a real difference to the environment.Here are some ideas for you to live a green life.Remember these three words;reduce, reuse and recycle（减量、再使用和再循环）.Reduce means “use less”.Don't waste things.This saves money and reduces pollution and waste going into the environment.Before we buy something new, think if it is really necessary or maybe the old one will be just as good!When we do buy things, choose local products if possible, and try not to buy too many things from abroad.xkb1.com

Reuse means “use again”.Use things for as long as possible.When we buy things, make sure that they last a long time.We should take care of them so that they will last, and we should repair them if we can instead of throwing them away and buying new ones.Don't use a paper cup or a paper bag.It's better to use a china cup and a lunch box because you can use them again.Recycle means “change things into something else”.Although it takes energy to change something into something else, it's better than throwing things away or burning them.Find out what can be recycled in your neighbourhood and take part in recycling programmes.We should also buy products made from recycled materials, such as recycled paper, to help save trees.Title: 51 to Live a Green Life

We produce waste every day and it is 52 to us.We can do something to help.Ideas Does Don'ts To 53 Use less

* Try to save something * Don't buy too many things from foreign 54.To reuse Use 55

* Use things for us long as possible.* Buy things that last long.* Take care of things or 56 the old things.* Don't use 57 cups or bags.To recycle Change things into something 58 * Join in recycling programmes.* Buy 59 made from recycled materials.Don't 60 things away or bu rn them.四、词汇运用(共25小题，每小题l分，计25分)A.根据句意和提示写出单词，完成句子。(每空一词)

61.The _________(每周的)newspaper is sent to you every Sunday.62.We should ________(面对)the difficulties bravely.63.Cheng Long is _________(认为)as a Kungfu superstar.64.Some bad websites have a bad ________(影响)on teenagers.65.The work is ________(超出)my ability.I’m afraid I can’t finish it by myself.66.Zhang Yimou is one of the most famous _______(direct)in China.67.The tigers are _________(disappear)faster than you think.68.The story has a surprising ________(end).69.When he caught up with the bus, he breathed ________(heavy).70.The man’s _________(die)was a great loss of his family.71.Every year the Spring Festival Gala(春晚)is covered l___ on the eve of Chinese New Year.72.Please knock at the door before e__________ the office.73.He i______ that he was at another place at the time of the crime and that he was not guilty.74.Qian Xuesen put all his e___________ into developing Atomic Bombs(原子弹).75.He answered the most questions in the game show and won a great p__________.B.根据短文内容及首字母提示完成短文。（每空一词）

Happiness is for everyone.In f 76 , happiness is always around you if you put your heart into it.When you are in t 77 at school, your friends will help you;when you study hard at your lessons, your parents are always taking good c 78 of your life and your health;when you get s 79 , your friends will congratulate you;when you do something w 80 , people around you will help you to correct(纠正)it.And when you do something g ood to o 81 , you will feel happy, too.All these are your happiness.If you notice a bit of them, you can find that happiness is always around you.Happiness is not the s 82 as money, it's a feeling of your heart.When you are p 83 , you can also be very happy, because you have something else that can't be bought with money.When you meet with difficulties, you can say loudly you are very happy, because you have more chances to challenge(挑战)y 84.So you cannot always say you are poor and you have bad luck.If you take every chance you get, you can be a happy and l 85 person.五、写作。(计20分)

A.根据所给提示将下列各句译成英语。(共5小题，每小题2分；计10分)86.你给我提了这么多宝贵的建议真是太好了。

It’s really _____________________ to offer me _________________________advice.87.周冬雨在这部电影中扮演主角之后立即成名了。

Zhou Dongyu ______________________after she ____________________in the film.88.请写下答案并且发短消息到95088.Please ________________ the answers and __________________________ to 95088.89.他家很穷，所以他很小的时候就开始谋生。

His family was poor, so he began to _________________ at ____________________.90.当我到达电影院时，电影已经放了十分钟了。

The film ___________________for ten minutes when I ______________ the cine ma.B.书面表达。(共一题，计10分)

新的一年又来到了，我们又长大了一岁，过去的一年我们有什么收获，在新的一年又有什么打算？根据下列提示写一篇短文。

1.我尽力学习，并且取得了更好的成绩。我养成一些好习惯，比如…… 2.我对家长懂得感恩，我不乱花钱，对他们诚实，经常帮他们做家务活。3.我对老师有礼貌，我感激他们辛勤工作，并且总认真听讲认真作业。

4.大约五个月后我要参加中考（exams for high school entrance）。我要做好充分准备，把中考考好。

5.我还要……

要求： 1.词数：80词左右;2.开头已给出，不计入总词数。

Another new year comes again.I’m one year older.Last year, _________________________________ _____________________

第五篇：初二物理寒假作业

初二物理寒假作业

完成了小学阶段的学习，进入紧张的初中阶段。这篇初二物理寒假作业，是查字典物理网特地为大家整理的，欢迎阅读~

一、选择题

1.关于平衡力，下列说法正确的是()

A.物体在平衡力作用下一定保持静止状态。B.物体在平衡力作用下一定处于匀速直线运动状态

C.相互平衡的两个力一定是性质相同的力 D.平衡力一定是作用在同一物体上的两个力

2.物体受两个力的作用，由下面哪种情况可以判断这两个力一定是一对平衡力()

A.物体保持匀速圆周运动 B.物体保持速度大小不变的直线运动 C.物体保持方向不变的直线运动 D.物体保持速度大小、方向都不变的直线运动

3.直升机在空中悬停时，之所以相对地面静止不动：是因为直升机()

A.受到空气的举力 B.受到地球的重力 C.受平衡力的作用 D.受到的举力大于重力

4.重力相等的甲、乙两个物体，分别在拉力F甲、F乙的作用下以2米/秒和1米/秒的速度匀速上升，则有()。

A.F甲F乙 B.F甲=F乙 C.F甲

5.下列现象中，物体受到非平衡力作用的是()

A.停留在水中某一深处的潜水艇B.匀速上升的直升飞机

C.沿田径弯道在匀速奔跑的运动员D.在平直的高速公路上匀速行驶的汽车

6.在下列图示中，表示物体受到的力是平衡力的图是()。

7.如图所示的铁球，在被压缩的弹簧上面能保持静止不动的原因是()

A.重力的作用 B.弹簧对它的支持力 C.地面对它的支持力 D.平衡力的作用

8.一个物体受到大小均为10N的一对平衡力的作用而做匀速直线运动，如果这对平衡力突然同时减小到5N，则物体()

A.速度减小B.按减小后的速度做匀速直线运动 C.仍按原来的速度做匀速直线运动 D.停止运动

9.用两只手在竖直方向拉一个弹簧秤，一只手向上拉秤上端，另-只手向下拉秤下端，这时弹簧秤的示数是8牛顿，若弹簧秤本身重力不考虑，则下列判断正确的是()

A.两只手各甩4书顿的拉力 B.上面那只手用8牛顿的拉力，下面那只手没用力

C.下面那只手用8牛顿的拉力，上面那只手没用力 D.两只手各用8牛顿的拉力

10.一辆重4105牛的汽车，在水平公路上匀速前进，它受到的阻力是5 104牛，则汽车受到的牵引力是().A.4105牛 B.5 104牛 C.4.5105牛 D.3.5105牛

11.起重机吊着5 104牛的物体，加速上升时，钢绳对物体的拉力()

A.大于5104牛 B.等于5104牛 C.小于5104牛 D.不可能作加速运动

12.一个物体在三要素完全相同的两个力的作用下，则物体将()

A.一定作匀速直线运动 B.一定静止状态 C.不可能做匀速直线运动 D.无法判断

13.用手握住瓶子的颈部使其悬空，瓶子不会掉下来，这是因为()

A.手对瓶的摩擦力与瓶的重力平衡 B.手对瓶的摩擦力与手对瓶的压力平衡

C.手对瓶的压力与瓶颈对手的压力平衡 D.手对瓶颈的压力与瓶的重力平衡

14.一物体重为800牛，当它从空中匀速下落时，它所受的空气阻力.f的大小()

A.f800牛 B.f800牛 C.f=800牛 D.无法确定

15.物体在平衡力作用下，将使它()

A.从静止开始运动 B.从运动到停下来 C.运动状态要发生改变 D.运动状态不发生改变

16.两架完全相同的直升机，甲机以5米/秒的速度匀速上升，乙机以4米/秒的速度匀速下降，不计空气的阻力，则()

A.甲机受到的举力较大 B.乙机受到的举力较大

C.甲、乙两机受的举力一样大 D.条件不足，无法判断 17.放在水平桌面上的书所受力中，属于平衡力的是 [ ]

A.书对桌面的压力与书所受的重力;B.书对桌面的压力与桌面对书的支持力;

C.书所受的重力与桌面对书的支持力;D.书对桌面的压力加上书的重力与桌面对书的支持力.18.用49牛的水平力把质量是1.5千克的木块紧压在竖直的墙上，这时木块对墙的压力是 [ ]

A.50.5牛;B.49牛;C.64牛;D.15牛.19、下列各物体中，受力不平衡的物体是()

A、地球同步卫星 B、匀速竖直上升的直升飞机

C、静止在水平桌面上的课本。D、在平直铁轨上匀速直线行驶的火车

20、下列说法中正确的是 [ ] A.物体处于静止或匀速直线运动时，一定只受两个力作用;

B.物体如果有外力作用，不可能处于匀速直线运动和静止状态;

C.两个力作用在一条直线上，大小相等，方向相反，这两个力一定是平衡的;

D一个物体的运动方向在不断改变，它受到的力一定不平衡.21.重80牛的物体放在水平桌面上，滑动时受到的阻力是12牛，要使物体作匀速直线运动，所需的水平拉力是 [ ]

A.12牛;B.68牛;C.80牛;D.92牛.查字典物理网给您带来的初二物理寒假作业，希望可以更好的帮助到您！