The moment the bullet rushed out of the barrel.
But with shotguns, explosive chemicals in bullets are not designed to explode immediately because they can cause the whole gun to explode and can endanger the lives of the shooters. Therefore, it was designed to make explosive chemicals relatively slow. The bullet moved very smoothly from the barrel of the gun, then a faster explosive exploded to create maximum thrust.
After pulling the trigger, the gun will be recoiled according to the basic laws of physics (the Law of Newton's motion), and simultaneously emit a loud bang, because the pressure from the explosion is suddenly released.
How does the bullet move?
When rushing out of the barrel, the bullet rotated at a very fast speed because the barrel was designed to have a spiral groove. This allows the bullet to fly more straight in the air and the ability to hit the target increases.
When fired, the bullet suffered a number of different forces such as air resistance, rotating force, return force . Therefore, when flying in the air, the bullet will not be able to fly in a perfectly straight line. but flying in a very complicated trajectory.
In fact, it only moves almost in a straight line when at a close distance, but at a distance, it moves in a slightly curved line downwards due to the impact of gravity.
The destructive force of the bullet?
Although small in size, due to the extremely fast movement speed, the bullet has a very large momentum.
In addition, the bullet also has a huge dynamic energy generated from burning explosives in bullets. But the kinetic energy of an object is equal to its square of velocity, so if its speed is doubled, the kinetic energy will increase fourfold.
The object loses its fast shoots, the greater its force. When hit, the bullet shoots its energy into the target and causes tremendous destruction.
Specifically, a bullet fired from the target hit field in 1/10 second can create a force equivalent to a heavy truck resting for 10 seconds. Imagine being stabbed by a truck, you will understand how powerful the bullet is .