“Plausible to open doors & jump out? No.”
Of course not. That’s why everyone has to be on the wings
so they can all jump at the same time.
“What was the speed at impact? I had read 430 mph”
Doesn’t matter. Once the people jump and leave the airplane
they would no longer be traveling with it.
“Once the people jump and leave the airplane
they would no longer be traveling with it.”
Better still if they had all run the opposite direction. 150 times 3 mph run per person would have neutralized the plane’s velocity. It would have touched the ground at 0mph.
Doesn’t matter. Once the people jump and leave the airplane they would no longer be traveling with it.
But they would still be moving at 430 mph (until air resistance slowed them down) in the direction the plane was traveling. It is called inertia. Yes, gravity would provide a vertical component to their velocity so that they wouldn't be traveling in the same direction as the plane. Plus, depending at what altitude they jumped off, they might end up dying upon impact with the ground anyway.