In accord with the rule, "If ACTION is A acting on B, then REACTION is B acting on A,"
Chapter 0, Problem e(choose chapter or problem)
In accord with the rule, "If ACTION is A acting on B, then REACTION is B acting on A," if we say action is Earth pulling down on the apple, then reaction is [the apple pulling up on Earth] [N, Nellie's hand pushing up on the apple].
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