From Wikipedia, the free encyclopedia
地心吸力係地球上面啲嘢都會吸落地心嘅力。佢實質係地球質量發出嘅萬有引力,即係地球重力。因為地上嘅嘢都吸向地心,所以叫地心吸力。
假如地球上嘅一件嘢無任何其他力拉住佢,響地面上面,地心吸力會令到物件有每平方秒9.78至9.83米嘅加速度。呢個加速度通常叫做地球重力加速度,用個g來代表。
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