momentum

• momentum(kg m/s) = mass(kg) X velocity(m/s)
• the greater the object’s mass or the greater its velocity the more momentum it has
• momentum before = momentum after
• conservation of momentum


  in a closed system (no external forces act) the total momentum before an event is the same as after
• forces can cause the momentum of an object to change
• when a non-zero resultant force acts on a moving object it causes its velocity to change
• force(N) = change in momentum(kg m/s)/change in time(s)