Roketi inarudije katika kinu chake? Je, inarudi kinyunyume au?


Ukiweza kupata jibu la swali: Je, risasi inarudije kwenye bunduki bila shaka utaweza kupata jibu la swali lako.
 
[h=1]Soma hapa chini:

What Is a Rocket?[/h]
NASA's Saturn V rocket carried humans to the moon.
Credits: NASA




Robert Goddard built the first liquid-fuel rocket.
Credits: NASA




The Falcon 9 rocket carries supplies to the space station.
Credits: NASA



This article is part of the NASA Knows! (Grades K-4) series.

The word "rocket" can mean different things. Most people think of a tall, thin, round vehicle. They think of a rocket that launches into space. "Rocket" can mean a type of engine. The word also can mean a vehicle that uses that engine.

How Does a Rocket Engine Work?
Like most engines, rockets burn fuel. Most rocket engines turn the fuel into hot gas. The engine pushes the gas out its back. The gas makes the rocket move forward.

A rocket is different from a jet engine. A jet engine needs air to work. A rocket engine doesn't need air. It carries with it everything it needs. A rocket engine works in space, where there is no air.

There are two main types of rocket engines. Some rockets use liquid fuel. The main engines on the space shuttle orbiter use liquid fuel. The Russian Soyuz uses liquid fuels. Other rockets use solid fuels. On the side of the space shuttle are two white solid rocket boosters. They use solid fuels. Fireworks and model rockets also fly using solid fuels.

Why Does a Rocket Work?
In space, an engine has nothing to push against. So how do rockets move there? Rockets work by a scientific rule called Newton's third law of motion. English scientist Sir Isaac Newton listed three Laws of Motion. He did this more than 300 years ago. His third law says that for every action, there is an equal and opposite reaction. The rocket pushes on its exhaust. The exhaust pushes the rocket, too. The rocket pushes the exhaust backward. The exhaust makes the rocket move forward.

This rule can be seen on Earth. Imagine a person standing on a skateboard. Imagine that person throwing a bowling ball. The ball will go forward. The person on the skateboard will move, too. The person will move backward. Because the person is heavier, the bowling ball will move farther.

When Were Rockets Invented?
The first rockets we know about were used in China in the 1200s. These solid rockets were used for fireworks. Armies also used them in wars. In the next 700 years, people made bigger and better solid rockets. Many of these were used for wars too. In 1969, the United States launched the first men to land on the moon using a Saturn V rocket.

How Does NASA Use Rockets?
Early NASA missions used rockets built by the military. Alan Shepard was the first American in space. He flew on the U.S. Army's Redstone rocket. John Glenn was the first American in orbit. He flew on an Atlas rocket. NASA's Gemini missions used the Titan II rocket. The first rockets NASA built to launch astronauts were the Saturn I, the Saturn IB and the Saturn V. These rockets were used for the Apollo missions. The Apollo missions sent men to the moon. A Saturn V also launched the Skylab space station. The space shuttle uses rocket engines.
NASA uses rockets to launch satellites. It also uses rockets to send probes to other worlds. These rockets include the Atlas V, the Delta II, the Pegasus and Taurus. NASA uses smaller "sounding rockets" for scientific research. These rockets go up and come back down. They do not fly into orbit.

How Will NASA Use Rockets in the Future?
New rockets are being developed today. They will launch astronauts on future missions.

The new rockets will not look like the space shuttle. These rockets will look more like earlier ones. They will be tall and round and thin. These rockets will take astronauts into space. They will take supplies to the International Space Station. NASA also is working on a powerful new rocket called a heavy lift vehicle. This rocket will be able to take big loads into space.

Together, these new rockets will make it possible to explore other worlds. Someday they may send humans to Mars.
Read What Is a Rocket? (Grades 5-8)
Return to NASA Knows! (Grades K-4)
Return to Students K-4
David Hitt/NASA Educational Technology Services

Last Updated: Sept. 8, 2015
Editor: Sandra May
 

Internet unayotumia inaweza kukupa majibu yote unayohitaji. Lakini mara nyingi watu wengi, hasa watanzania hawatumii internet kwa kujifunza. Kama wewe hapo.
 
PAGAN said:
Internet unayotumia inaweza kukupa majibu yote unayohitaji. Lakini mara nyingi watu wengi, hasa watanzania hawatumii internet kwa kujifunza. Kama wewe hapo.
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Kwahiyo unataka jf iwe sehemu ya umbea tu?
 
Mkuu K 4 LIFE ulifika Mbeya salama vipi bajaji yako umeifanyia service baada ya safari...ila ulininyima lift
 
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Mapovu said:
Mkuu K 4 LIFE ulifika Mbeya salama vipi bajaji yako umeifanyia service baada ya safari...ila ulininyima lift
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mkuu nilifika salama na bajaji yangu ila pale mikumi nilipata changamoto ya kufukuzwa na simba wa 5 kwa umbali wa km.2. lakini hawakufua dafu kwa bajaji yangu kwani waliambulia vumbi tu.
 
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KABERWA2013 said:
Kwahiyo unataka jf iwe sehemu ya umbea tu?
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Google itakupa mwongozo wapi utapata maelezo kwa upana zaidi tena na facts. Sio kila simple question uje kuuliza JF na kama unataka hapa iwe sehemu ya umbeya au utukuyu hiyo ni juu yako
 

Kidogo maelezo yako yanafanania na ukweli lakini mbona cjawahi kusikia watu wa mamlaka ya anga wakitaadharisha watu wengine wanaotumia anga au bahari kuhusu auangukaji wa vitu vizito au mabaki ya rocket ili vcje vikagongana!
 
Zile Shuttle za USA pekee ndiyo zilikuwa zinarudi.

Warusi huwa wanaweka juu ya Rocket KiTUFE ambacho kinaweza kuhimili joto kali sana na ndiyo pekee huwa kinarudi.

Kwenye ile Makala ya ndege nilikuwekea jinsi hilo Dubwana linavyoonekana likishatua ardhini.

Kwa Shuttle angalia michoro na picha:



Hizo rocket ndogo mbili zinasaidia tu Shuttle kuruka na huanguka mapema sana baharini huko Florida na wanazichukua na kuzitumia tena. Hilo limtungi la tofauti na Rocket, lenyewe haliwaki zaidi ya kuibeba Hydrogen Liquid kama sikosei.

Kwa ujumla mambo yanakuwa hivi:



Hilo Dege huwa linatua HOUSTON. Na wakishachukua DATA zao zote wanazozitaka hao NASA, basi wanalibeba na kulirudisha tena Florida tayari kufungiwa mtungi na rocket na kwenda kurushwa tena angani.

 
kawaida2 said:
Kidogo maelezo yako yanafanania na ukweli lakini mbona cjawahi kusikia watu wa mamlaka ya anga wakitaadharisha watu wengine wanaotumia anga au bahari kuhusu auangukaji wa vitu vizito au mabaki ya rocket ili vcje vikagongana!
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rocket inatembea kwenye space na hakuna nguvu ya mvutano (gravitation force) hivyo hupotelea huko huko havifiki huku
 
rocket ni kama sindano mara nyingi hutumiwa mara moja bila kurudiwa labda baada ya marekebisho makubwa sana.
hivyo zaidi ya 99% ya rocket hutengenezwa kwa ajili ya kutumiwa mara moja.
 
Kuhusu ROCKET hazipishani sana. Sema tu kwenye Rocket, ni kuwa kama zimebeba watu,basi juu kabisa wanaweka Kitufe kitakachorudi ardhini. Kama imebaba chombo ambacho hakitarudi ardhini basi huunguza kila kitu angani.

Rocket zimetengenezwa kama PETE na hizo Pete moja baada ya nyingine huunguwa na ikiishiwa "MAFUTA" basi inajifungua na kuanguka na mwisho kuungua angani na Pete inayofuata inaanza kuchoma MAFUTA yake na mchezo unarudia uleule hadi chombo kinafika kwenye sehemu kinapotakiwa kufika.

NASA huko Florida na Europe Space huko Kourou-Guiana hutumia sana Rocket mbili za kusaidia kuruka na baada ya urefu mfupi, hufyatuka na kuanguka baharini ambapo zinachukuliwa na kutumika tena.
Warusi wao huwa wanakuja na dude zimazima bila rocket ambapo likifika huko Kazakhstan hurushwa angani. Leo hii ndiyo njia pekee ya kufika angani kwa NASA baada ya wao kusimamisha Space Shuttle.



 
Percival said:
Hakuna roket inarudi kwenye kinu chake. roket ikiushwa basi ndio hairudi ina tumika mara moja tu. Kuna ya aina moja tu - Space shuttle ya marekani ambayo inaruka kama roket na inauwa kama ndege na inatumka tena
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Acha uongo mkuu
 
Hilo ni Gari likwa limebeba NASA likiipeleka kwenye kituo chake cha kurukia. Ukweli ni kwamba kuna magari special ya kuibeba roketi hizo pindi zinapo rudi toka anga za juu
 
Hao NASA balaa wanadamu wengine sijui wanawazaje na kuja na midude kama hii. Mimi nawaza wali maharage nitapata wapi.
 
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