Physics - Mechanics - Momentum - Conservation of momentum - Conservation of Momentum

A 4-step lesson. Step 1: 'In any collision (or explosion), the TOTAL momentum before = TOTAL momentum after, provided no external forces act. m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂.' This comes from Newton's Third Law: forces between objects are equal and opposite. Step 2: 'Example - Collision: A 2kg ball at 5 m