Physics quantities are horribly (wonderfully) abstract: energy, forces, momentum…. If you could visualise them, they’d be easier to teach.
Bar models are great for representing some abstract concepts in physics, but it’s a struggle to represent 2 variable quantities such as power and momentum. It’s even trickier with negative quantities.
Until now (or last September anyway) when James de Winter forwarded me this link
which I’ve simplified to:
Over the past week or so I’ve been developing this handout for momentum (untested in the field).
I’d welcome feedback.