Two particles,each of mass m,are moving with velocity 
and 
The kinetic energy at the center-of-mass is
Definitions:
Limbic System
A complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood. It controls basic emotions and drives.
Emotions
Sophisticated emotional conditions that encompass an individual's internal experience, physical responses, and outward behaviors or reactions.
Cerebrum
The largest part of the brain, responsible for various higher functions like thought, action, reasoning, and creativity.
Hemispheres
Each of the two halves of the brain or the Earth, divided by either the cerebral fissure or the equator.
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