Bullet Trajectory: Understanding Downward Velocity After Firing

If you shoot a gun up, the velocity of the bullet coming down is approximately the same as the velocity it had when it was fired, except in the opposite direction. This is because the acceleration due to gravity is the same for all objects, regardless of their mass. Therefore, the bullet will decelerate as it moves up due to gravity, and then accelerate as it falls back down due to gravity. As a result, the bullet's velocity will be approximately the same magnitude when it comes back down as it had when it was fired, but in the opposite direction.