Henrietta asked in 科學其他:科學 · 1 decade ago

物理問題...有關火箭 急!!!

A rocket traveling 1850 m/s away from the Earth at an altitude of

6400 km fires its rockets, which eject gas at a speed of 1300m/s(

relative to rocket). If the mass of the rocket at this moment is 25,000

kg and an acceleration of 1.5 m/s² is desired, at what rate must the

gases be ejected?

Ans: -76 m/s

解好久就是算不出來...請高手告訴我這題到底要怎麼解??

萬分感謝!

Update:

一火箭以1850 m/s的速度離開地球達6400 km 的高度

排放之廢氣相對於火箭的速度為1300m/s

若火箭此時之重量為25000kg且加速度為1.5 m/s²

求每秒排放多少廢氣?

Update 2:

重翻最後一句:求廢氣被排出之速度

3 Answers

Rating
  • 1 decade ago
    Favorite Answer

    物理問題...有關火箭 急!!!

    A rocket traveling 1850 m/s away from the Earth at an altitude of

    6400 km fires its rockets, which eject gas at a speed of 1300m/s(

    relative to rocket). If the mass of the rocket at this moment is 25,000

    kg and an acceleration of 1.5 m/s² is desired, at what rate must the

    gases be ejected?

    Ans: -76 m/s

    你可以先把題目翻譯成中文媽??? 英文太爛了 但物理不錯強

    2008-10-14 16:44:48 補充:

    你整個題目單位跟答案的都不一樣

    Source(s): 自己
  • 1 decade ago

    The answer is from our text book.

    Physics for Scientists and Engineers, 4th ed. (2008)

    author: D. C. Giancoli

    publisher:Pearson

    The question you ask is also my problem.

    BY Ying

  • 1 decade ago

    Your listed answer is of unit in speed (m/s).

    Gas exhaust rate shall be of unit in mass per time.

    Please check it.

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