이거 따로위치에대해서는말이없는데 역학적 에너지 잃은정도를
구하라하니까 뭐가 조금 풀어도 안믿겨져서..

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b를한건데 위에꺼에서 밑에꺼빼면 그냥 잃은 역학적 에너지 맞겟죠?

- dc official App