Third Law of Momentum The law of Interaction states that to every action there is an equal but opposite reaction. From impulse-momentum theorem

Third Law of Momentum

  • The law of Interaction states that to every action 

there is an equal but opposite reaction.




  • From impulse-momentum theorem


Symbols

  • m - mass

  • Vf - final velocity

  • V0 - initial velocity









Conservation of Linear momentum

  • When objects interact (collide) the total momentum 

of an isolated system of the objects remains constant

  • Momentum before = after


Examples

  • When a gun is fired, the bullet travels forward, 

but the rifle recoils in the opposite direction








  • When a person walks on a skateboard, the skateboard moves in the opposite direction