Ballistics

The ballistic is the Science which has as an aim the motion study of the projectiles.

Approaches mathematical

Ballistics is a particular case of a Mouvement Uniformly Accelerated (MUA) when acceleration is equal to that of the Pesanteur, expressed by the constant g directed downwards.

One can then pose in a orthonormée vectorial base:

\ vec {R} (T) = \ frac {1} {2} \ vec {G} t^2+ \ vec {v_0} t+ \ vec {r_o}

The range reached by the projectile is expressed by (here it is not a question of vectors):

p = \ frac {G}

with v_o initial speed and \ alpha the initial angle of inclination compared to the horizontal one.

Fields of study

One distinguishes:

  • the interior ballistic , whose object is the whole of the phenomena occurring inside the gun (movement of the projectile, relaxation of gases…)
  • the external Ballistic , whose object is the movement of a projectile àmath>. With short range, one can be unaware of the curve of the ground and use the formulation described above. However the description of the trajectory of a Ballistic missile with long range requires a correction taking account of the terrestrial curve.

See too

Related articles

External bonds

  • ballistic on wiktionnaire
  • ballistic Clock
  • Ballistic in XVIe and XVIIIe. around work of Bélidor (pdf)
  • Trajectory of a shell with long range and its modeling
Category: Technology and sciences applied Category: Criminology

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