Collision between two carom coins is an example of an inelastic collision. In this collision, the kinetic energy of the system is not conserved, and some energy is lost due to deformation or other forms of energy transfer. Let's discuss this in more detail.

Definition of inelastic collision
An inelastic collision is defined as a collision between two bodies where the kinetic energy of the system is not conserved. In an inelastic collision, some of the kinetic energy is converted into other forms of energy, such as deformation, sound, or heat. The total momentum of the system is conserved, but not the total kinetic energy.

Characteristics of inelastic collision
- The colliding objects stick together after the collision.
- The kinetic energy of the system decreases.
- The momentum of the system is conserved.

Explanation of collision between two carom coins
When two carom coins collide with each other, their surfaces come in contact, and some deformation occurs due to the force of the impact. This deformation results in the loss of some of the kinetic energy of the system. The two coins will stick together after the collision, and their combined velocity will be less than the initial velocity of the first coin. Therefore, the collision between two carom coins is an example of an inelastic collision.

Conclusion
Inelastic collisions are common in everyday life, and they play an important role in understanding the behavior of physical systems. The collision between two carom coins is a simple example of an inelastic collision, where some of the kinetic energy of the system is lost due to deformation.

In ideal case,we can take each collision as elastic collision with no loss in energy to the surrounding.

In real case, all collision are inelastic as their is some loss of energy from system to the surrounding.

In case of carrom coins,some part of the kinetic energy of the coin on collision gets dissipated in tha form of heat,sound, friction etc. This leads to decrease in kinetic energy.