Question: NASA uses a specially equipped airplane (called the Vomit Comet) to provide a simulated zero-gravity environment for training and experiments. This airplane flies in a

NASA uses a specially equipped airplane (called the “Vomit Comet”) to provide a simulated zero-gravity environment for training and experiments. This airplane flies in a long, parabolic path. Explain how a passenger can feel “weightless” near the top of the parabola.

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