本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified
[问答题]
We claim that momentum( yu13f mvb1(r wh;y1wdt pv*u and angular momentum are conserved. Yet m+ y)u(uggegn3 3 2zaafost moving or rotating objects eventually slow down and) a (znga3 ueu23gf+gy stop. 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:
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Post time 2025-2-18 20:00:22