4 ms·

There's a lot of vibration, but the G forces are not that high, and they are particularly low during launch. The highest G force is right before the main engine

There's a lot of vibration, but the G forces are not that high, and they are particularly low during launch. The highest G force is right before the main engines cut off, once the rocket is already in space, at which point you presumably don't care anymore... For falcon 9 you don't even reach 2G until more than 60 seconds into the flight when the engines throttle back up after passing through max Q. Acceleration graph: https://qph.fs.quoracdn.net/main-qimg-23ba4a3fe7f535430bed80f039d3e720 https://qph.fs.quoracdn.net/main-qimg-23ba4a3fe7f535430bed80... (from https://www.quora.com/What-is-the-acceleration-of-a-Falcon-9 https://www.quora.com/What-is-the-acceleration-of-a-Falcon-9)

livingmargot 7y ago
The passenger would feel one extra 'g' from gravity itself. Meaning it would reach a total of 4.5G, which is substantial.
- dandelany 7y ago
  Not without the ground pushing back against them, they wouldn't. Turn off the engines and the passengers feel weightless (because both vehicle and pax are accelerating earthward at 1G); therefore turn them back on @3.5G and they'll feel 3.5G, no?
  - strainer 7y ago
    That acceleration graph starts at 1G and goes up to 4.5 Freefall is 0G. The G force we feel is the difference between gravitational acceleration and our motion towards the center of gravity, so most of our lives we experience 1G. The complication is that gravitational acceleration doesn't feel like acceleration so remaining stationary in gravity does.