[問題] 請問地球自轉的能源
請問有學術討問論過地球自轉的能源是什麼嗎?Orz
如果地球自轉需要靠外力的話
那表示他的速度是不穩定的
可能呈現加速或是減速運動
但是如果不需要外力的話
地球大氣每天與成千上萬的太空小石子摩擦
照理說能源會不斷消耗在這上面
使的自轉速度減緩
有沒有這方面的問題/
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↑↑↑這句話是錯誤的
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這裡我的確搞錯
1個動能1焦耳的物體 在相反方向上面被作功2焦耳
它的動能會變成 1焦耳 在這個物體停止之前這個外力是對它"作負功"
等到它的方向跟此力同方向時 這個外力是對他"作正功"
而我也要解釋上面的推文"動能不能抵銷跟相減"
對一個動能作反方向的功 是可以抵銷和減少該物體的動能
一直到該物體靜止或是方向改變為止
不是討論正負能量的那些理論
純粹是指方向上的問題
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※ 編輯: aragornwill 來自: 118.171.30.6 (02/12 21:23)
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