On the ground, in a pocket, in a bucket, etc..
A bullet fired from a gun
The muzzle is the opening at the end of the barrel where the bullet exits when fired.
When the gun is fired the shell casing is ejected by the blow-back gas and the next bullet is automatically loaded. All in one motion. The next bullet is now ready to fire.
The bullet fired from a gun has greater horizontal acceleration. For vertical acceleration, they are both the same.
Actually, the proper name is "cartridge." The term bullet is an extremly common but incorrect usage when referring to a cartridge. The term bullet only refers to the piece of lead that comes out of the barrel when the gun is fired. The bullet is one component of the cartridge.
Yes.
Projectile, bullet
I used gelatin or a large water tank.
When a bullet is fired from a rifled firearm, the rifling leaves marks on the bullet. Those marks are unique to that gun, and no other gun makes exactly the same marks. If a bullet (or fired cartridge casing) is recovered from a crime scene, and we suspect that YOUR gun was used to commit this crime, then a sample bullet is fired from your gun, and compared to the crime scene bullet. A comparison microscope is used to compare the bullets, or marks made on the fired cartridge case by the extractor and firing pin.
It is known as the Velocity (speed).
It's the recoil from the force of the bullet being fired. The gun powder pushes the bullet forward and also equally pushes the gun back into your hand.
Bullet forward, gun back - as in when the gun is fired, the bullet goes forward, and the explosion pushes (recoil) the gun backwards.