explain please.
In: Physics
The planes aren’t actually creating zero-g, which is impossible, they’re just simulating the effect of weightlessness by causing the people inside to be in free fall, which is the same reason astronauts in space experience weightlessness. The plane performs what’s called a [parabolic arc](https://newsimg.bbc.co.uk/media/images/42862000/gif/_42862923_parabolic_flight416.gif). This is when the plane pitches up in a steep climb, levels out, and them dives down at the same angle. As the plane levels off and dives down again, it enters a ballistic trajectory, and the passengers (and everything else inside) will be weightless for 20-30 seconds.
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