Conservation of Momentum: The law of conservation of momentum states that the total momentum of a system remains constant provided no external force acts on the system.

Key Points:

• Momentum is a vector quantity calculated as mass × velocity (p = mv).
• In an isolated system (no external forces), total momentum before and after an interaction is the same.
• Internal forces between bodies can transfer momentum within the system but do not change the total momentum.
• This law applies to all types of collisions: elastic and inelastic.
• Mathematical expression for two bodies: m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂.
• It is a fundamental principle in physics for understanding motion and interactions.

Example: When two ice skaters push off each other on frictionless ice, the momentum lost by one is gained by the other, keeping total momentum constant.

C.O.M – Conservation Of Momentum

• C – Constant total momentum in an isolated system
• O – Only changes if external forces act
• M – Momentum is mass × velocity

Tip: Remember “Momentum Moves, Nothing Changes” to recall that total momentum stays constant if no external force acts.

Drag each item to the correct category:

• Momentum is a vector quantity, calculated as mass × velocity (p = mv).
• The law of conservation of momentum states that the total momentum of a system remains constant if no external forces act.
• Internal forces only transfer momentum within the system; they do not change total momentum.
• Mathematical expression for two-body collisions: m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂.
• The law applies to all types of collisions: elastic and inelastic.
• Useful in analyzing motion, collisions, and interactions in physics problems.