本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified
[问答题]
We claim that momentuqw y0895f jbxmfksos h0,5 z;8h+w cutm and 0 nh*k zx7ig 0;p,sijv5zuo 9bpkd +1cangular momentum are conserved. Yet most moving or rotating objects eventually slow down and stop. Explainizj;i5b pho k71dk,zv0 pcgn0s9u* x+.
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:
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Post time 2025-2-18 20:00:22