EDIT: I just thought about it, and I have to imagine that to anyone who has no clue about physics, normal sentences like ours must sound exactly like the senseless FET statements like "the sun is black and possibly a hollow electromagnetic converter". No wonder there's a problem...
I think you're onto something there. For example,
transferring their momentum.
If you already kept him reading up until this point, well, you've lost him now. We spent a good dozen pages one time explaining inertia to him. He argued endlessly that inertia doesn't exist and that those indoctrinated scientists just make up words to sound smart.