Conservation of Momentum _ A-Level Physics

The video tutorial explains the concept of conservation of momentum, stating that the total momentum in a closed system remains constant before and after a collision. It provides an example involving an ice hockey player and a practice dummy to illustrate this principle. The tutorial then distinguishes between elastic and inelastic collisions, noting that elastic collisions conserve kinetic energy, while inelastic collisions do not. An example of an inelastic collision between two particles is given, showing the loss of kinetic energy and the resulting velocities of the particles.

What was the kinetic energy before and after the collision in the example provided?

Explain why the collision in the example is considered inelastic.