Day 122 – Whiteboarding CoM


Physics 11 – Whiteboarding last day’s results was the main even for today but I forgot to take pictures.  By going around the room from whiteboard to whiteboard I posed the question, “what pattern do you see?”  Inevitably the students start to see that in each case, the moment of the objects before the interaction is equal to the momentum of the objects afterwards.  Ah ha! Conservation of Momentum!

I then showed the students how conservation of momentum can also be seen as a consequence from Newton’s Third Law.