本题目来源于试卷: Rotational Motion，类别为 IB物理学
[问答题]
We claim that momentum and angul 1-oz,vgv8ihvar momentum are conserved.di+n txt*+.l v Yet most moving or rotating objects eventually slow down and itdl.t+v*x +nstop. Explain.
参考答案:
Momentum
and angular momentum are conserved for closed systems – systems in which there
are no external forces or torques applied to the system. Probably no macroscopic systems on Earth are
truly closed, and so external forces and torques (like those applied by air
friction, for example) affect the systems over time.
本题详细解析:
暂无
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