>>11687085>Falcon9 rocket will still fly for few seconds even if all the engines shutdownNo, it will fall, unless it was moving up. However, if it started 10m off the ground, moving up, and you cut the engines, by the time it goes up and falls down to the same height, it'll be moving the same speed it was moving up, except now it will be moving down.
>but it will still continue to fly until the force of gravity + weight of the vehicle is greater than the thrust force created by the enginesThis is nonsense. Gravity is gravity, all objects accelerate at the same rate in gravity regardless of mass, it's not gravity plus weight. If you drop a million ton boulder or a feather from one kilometer up on the Moon, they both land at the same time.
>If you fire the gun straight up into the air, the bullet will continue to fly up and then at certain time, slow down to halt and then free fallNo, the bullet is in freefall the moment it leaves the gun barrel. Fire a bullet up on Earth, and it is instantly accelerating down at 9.8m/s^2, and it takes a little while for this 9.8 meters per second per second of velocity change to reduce the bullet's velocity to zero, and then it starts to speed up again until it hits the ground. On Earth the bullet only ends up falling at the speed at which the drag from the air is equal to the pull from gravity, but on the Moon if you shot a bullet straight up, it would go about 6 times higher due to the lower gravity, but when it came back down it would be moving at the same speed it left the gun barrel at.
>A gun doesn't need to be fired at every attosecond of distance traveled by the bullet.Correct, because a bullet like any massive object has momentum, but what does happen is that every attosecond of time that goes by as soon as the bullet is no longer being pushed down the gun barrel is that the bullet is slowing down from gravity and air resistance.
