Advantages of studying collision process:

There are various types of forces and interactions in the nature. These forces and interactions act in both the macroscopic and microscopic levels. Therefore the study of collision which is actually the relative motion between two colliding particles, helps us to understand the basic characteristics and nature of the interactions and forces. The measurements of initial and the final energy of the colliding particles and the linear and angular momentum of the colliding particles in accordance with the law of conservation of energy and momentum help to understand the nature of collisions

Inter atomic or inter molecular forces can be understood by the collision between molecules of gasses according to kinetic theory.

The deflection of the path of a comet passing near the solar system helps us to understand the nature of gravitational force.

(i) Nuclear reactions involving high energy electrons, protons, neutrons, etc., (ii) in Compton scattering, the scattering of high energy photon, (iii) in Rutherford scattering, the scattering of \( \alpha \) particles help us to understand the nature of nuclear forces, properties of the nucleus and atomic structure.