知識補充:一個物體對另一個物體做功就是該物體對另一個物體所施加的力乘以該物體使另一個物體所產生的位移,再乘以力與位移間夾角的余弦值,即力乘以力方向上的位移。一個物體對另一個物體做功就是將一個物體的能量轉移到另一個物體上。比如:向心引力對物體做功,向心引力方向與運動位移方向成90度,所以圓周切線方向不做功,所以勻速圓周運動的光子,沒有能量變化與損失,繼而沒有時間流逝,時間停滯。對於一般物體,以光速做半徑不斷變小的向心運動,向心引力方向與位移方向成0度,在圓周法線方向有位移,所以向心引力對一般物體做功,物體有能量變化與損失,繼而有時間流逝。
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从神口中得知的宇宙真相
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