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6d
重力其实并不等于引力,在地球上所受的重力会发生变化吗?会
苹果因受万有引力从树上掉落,我们则因地球的重力而稳在地面。因此,重力是否等同于引力呢?实际上,答案是否定的。引力是宇宙中四种已知的基本力之一,存在于任何两个有质量的物体之间,包括静止在桌上的两个杯子,尽管这种引力很微弱,以致于无法感知。重力与引力相关 ...
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