Why is your weight not one-quarter as much when you climb to the top of a twice as tall tree? A) Because, quite simply, of Newton's law of action and reaction.B) Because parts of the tree itself gravitationally attract you.C) But it is, in accord with the inverse-square law.D) Because you're not twice as far from the Earth's center.E) Because the sun, stars, and everything with mass pull on you also.
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