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gc physics textbook chapter 6 problems (id: 6468a28aa)

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admin 发表于 2024-11-24 21:43:00 | 显示全部楼层 |阅读模式
本题目来源于试卷: gc physics textbook chapter 6 problems,类别为 IB物理学

[问答题]
What happens to the gravitational poteosj5 v mloi-)2 a*,ejp3cuc4jo7ocz09j:d* mv nfk+jntial energy when water at the top of a waterfall falls kj9 4cjcf+u*j7o z:3 mvo0ndcto the pool below?




参考答案:

When water at the top of a waterfall falls to the pool below, initially the water’s gravitational PE is turned into kinetic energy.  That kinetic energy then can do work on the pool water when it hits it, and so some of the pool water is given energy, which makes it splash upwards and outwards and creates outgoing water waves, which carry energy.  Some of the energy will become heat, due to viscous friction between the falling water and the pool water.  Some of the energy will become kinetic energy of air molecules, making sound waves that give the waterfall its “roar”. 




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