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2. Imagine being an astronaut doing a spacewalk outside the shuttle. In your
excitement, you miss the fact that you have used up all the gas in your
reaction jet. How do you plan to return to the space shuttle?
3. How do action-reaction force pairs work on large and small objects?
a. Why doesn't the Earth appear to move when you push down on it with
your foot?
b. How do rockets take off? Apply Newton's third law.