Momentum

• Momentum 


  How hard it is to stop an object
• Formula for momentum

  Momentum = mass x velocity

  P = m x v

  Kgm/s = kg x m/s
• Momentum is a vector scale, so is represented by a negative symbol if towards the left or opposite direction
• A momentum of a system ( collection of items ) is the sum of the momentums of all the objects in that system
• Law of conservation of momentum

  when two objects collide in a closed system, the total momentum of the two objects before the collision is the same as the total momentum of the two objects after the collision.
• Equation for CHANGE in momentum

  Change in momentum = force x time
• In an explosion, mass is scattered in all directions, meaning that the total momentum of all the matter after the explosion is 0