[問題] 物理一題，關於力學
小惠在自己家中的後院看到成熟的蘋果由樹上落下，根據萬有引力定律，下列哪一項推論
正確？
(Ａ)地球與蘋果必會互相吸引，且兩個相互吸引的力大小相等
(Ｂ) 蘋果落下期間，地球吸引蘋果之力小於蘋果吸引地球之力
(Ｃ)蘋果落下期間，僅有地球吸引蘋果的力量，而沒有蘋果吸引地球的力量
(Ｄ) 地球的質量大於蘋果的質量，所以地球吸引蘋果的力量大於蘋果吸引地球的力量
這是我在翻歷屆試題的時候碰到的問題
答案是A
不過若是力的大小相等不就是達到平衡了嗎？
請問為什麼蘋果還會掉下來呢？
嗚嗚，底子不好，不要罵我QAQ
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