> Constant acceleration is what you feel when you are standing on the ground Acceleration only occurs when there's a change in velocity. What you feel while st

> Constant acceleration is what you feel when you are standing on the ground Acceleration only occurs when there's a change in velocity. What you feel while standing on the ground is a constant force, but due to the normal force (of equal magnitude but opposite direction) of your feet pushing back on the ground, no acceleration occurs. The rocket on the other hand is accelerating, and that acceleration causes the normal force between your body and your chair to accelerate your body with the rocket.