momentum

• what is momentum = to?

  mass X velocity of an object
• is momentum a scalar or vector quantity?

  vector
• what is the conservation of momentum principle?


  the idea that in a closed system the total momentum before an even (e.g. collision) is exactly the same as the total momentum after the event
• what is a closed system?

  a system where matter cannot enter or leave but energy can be exchanged with its surroundings