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The force on each other is the same (action and reaction)

The skier and the earth accelerate toward each other according to:

acceleration = force / mass.

But because the earth is so massive , (compared to the skier) its rate of acceleration is immeasurably small, as is the distance it travels.


This is only concerned with the vertical component of the skiers motion.

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Q: Why does the skier accelerate while earth does not seem to move at all?
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