本题目来源于试卷: gc textbook chapter 7 Linear Momentum，类别为 IB物理学
[问答题]
How can a rocket change :tp+a9; inlu sfa1(eeg h;2ho directiodr( yeia/ x3r.n when it is far out in space and is essentially ia/e.3d (xir ryn a vacuum?
参考答案:
When a rocket expels gas in a given direction,
it puts a force on that gas. The
momentum of the gas-rocket system stays constant, and so if the gas is pushed
to the left, the rocket will be pushed to the right due to Newton’s 3rd law. So the rocket must carry some kind of
material to be ejected (usually exhaust from some kind of engine) to change
direction.
本题详细解析:
暂无
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