本题目来源于试卷: Space Time & Motion A.2 Forces & Momentum，类别为 IB物理学
[单选题]
A rocket ejects hot gas in space in a direction opposite to its travelling direction. What is correct for the magnitude of the momentum and the kinetic energy of the rocket?
A. Momentum is Conserved ;Kinetic Energy is Conserved
B. Momentum is Increased ;Kinetic Energy is Conserved
C. Momentum is Conserved ;Kinetic Energy is Increased
D. Momentum is Increased ;Kinetic Energy is Increased
参考答案: D
本题详细解析:
Explanation: The rocket is not a closed system. The reaction force from ejecting hot gas will increasingly accelerate the rocket, hence D.
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