* Air Resistance: The bullet will experience significant air resistance on its way up and down. This drag force slows the bullet down, reducing its velocity.
* Gravity: Gravity constantly pulls the bullet downwards. As it slows down on its ascent, gravity will pull it back down, but the bullet will never reach the same upward velocity it had initially.
* Terminal Velocity: Eventually, the bullet will reach a terminal velocity, where the force of gravity and air resistance are balanced. This terminal velocity is much lower than the initial velocity.
In short: The bullet will return to Earth at a much slower velocity than it was fired, and its direction will be downwards.
