Shoot into space
First of all, when shooting on the earth, people will hear a strong shooting sound-that is, the sound of bullets leaving the muzzle. But because there is no sound in space, people who shoot in space will not hear gunshots. So, the first major difference is that there is no fire when shooting in space.
Moving distance of bullet
Moving distance of bullet
Although the speed of a bullet in space is the same as that on the earth, the distance it flies will be very different.
On earth, bullets can fly hundreds of kilometers. Because of the gravity of the earth, it will pull the bullet to the ground and take away the energy needed to continue flying.
However, in space, a bullet can fly straight ahead, even forever, because there is no powerful force in space to slow it down. Moreover, the vacuum space will not produce friction on the bullet to slow down its speed or change its trajectory. Finally, because the universe is expanding at an accelerated speed, unless the bullet touches something to slow it down or stop it, it will move forever.
Newton's law is valid.
Newton's law is valid.
When a bullet hits the earth, the shooter will be recoil by the gun. This is due to Newton's third law of motion: every force has an equal and opposite reaction. Therefore, when a bullet is fired, it will exert the same force in the opposite direction of its motion. This is why when shooting, people will feel a sudden and powerful force pushing back their shoulders, and people who are not used to this recoil are easy to get hurt.
Even with such a strong impact, people can still stand on the ground because of the traction of the earth's gravity, and will not make people fly in the opposite direction of the bullet. But since there is no gravity in space to bind people to the surface of objects, what will happen?
When fired in full horizontal alignment with the earth's orbit, the bullet will move forward, then come back around the earth and hit the shooter from behind. Therefore, the shooter should not want to aim. ...