2. For every action, there is an equal and opposite reaction

6.  Mass times velocity Or p=mv It’s a lot like inertia, except it includes the effects of speed and direction Momentum can often explain outcome when 2 objects don’t seem to follow Newton’s 3 rd. (there can never be any exceptions to a “law”)

8.  Momentum in a system of interacting objects is conserved (stays the same) but is transferred

9.  Ex 1: Who moves away faster? Does it matter who pushes harder?  Ex 2: How is the Earth affected when you jump?