Final answer:
Interior ballistics are the factors within the barrel affecting the motion of the projectile before it leaves the barrel. This includes the bullet's acceleration and the forces acting on it while inside the barrel, in contrast to exterior ballistics, terminal ballistics, and tactical ballistics which are concerned with the projectile's behavior after leaving the barrel, impacting a target, and in tactical use, respectively.
Step-by-step explanation:
The factors within the barrel affecting the motion of the projectile before it leaves the barrel are known as interior ballistics. This field of study deals with the processes beginning with the propellant's ignition until the projectile exits the gun barrel, which includes the bullet's acceleration and the forces acting upon it while it is still within the barrel. In contrast, exterior ballistics involves the study of the projectile's behavior after it leaves the barrel, terminal ballistics analyzes the effects of a projectile when it hits a target, and tactical ballistics generally deals with the use and effects of projectiles in a tactical context.
As an example illustrating interior ballistics, if a bullet in a gun is accelerated from the firing chamber to the end of the barrel at an average rate of 6.30×105 m/s² for 8.10×104 s, one can calculate the final velocity or muzzle velocity of the bullet using the formula final velocity = initial velocity + (acceleration × time). Assuming the initial velocity is zero (since the bullet is at rest before being fired), the final velocity can be calculated by simply multiplying the acceleration by the time.