本题目来源于试卷: gc physics textbook chapter 5 problems，类别为 通用国际物理
[问答题]
Does an apple exert a gravitational force on the Earth? If unzu0 vh)s n49so, how large ajkb/c+)4 jo9esq(oyp force?jkc+ j y)49oeq p(o/sb Consider an apple
(a) attached to a tree, and (b) falling.
参考答案:
The apple does exert a gravitational force on the Earth. By Newton’s 3$^{rd}$ law, the force on the Earth due to the apple is the same magnitude as the force on the apple due to the Earth – the weight of the apple. The force is also independent of the state of motion of the apple. So for both a hanging apple and a falling apple, the force on the Earth due to the apple is equal to the weight of the apple.
本题详细解析:
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