How can vehicles wheels rotate that freely eventhough there is a massive weight resting on them?

Question

Edit: thank you so much for the clear explanation! It makes so much more sense now!

In: Physics

Answer 1

Bearings: balls or rollers made out of hardened steel take the load, since the area of contact is small and the steel very hard there isn’t much friction at all, it’s the same stuff that makes fidget spinners bales to rotate for minutes on their own