Rolling a sphere-like object

I want to roll a sphere-like object on Y axis like a tire when it’s chasing the character. I tried to do with a timeline but couldn’t make it smooth, it went wild. How do I do it with the option to change it’s speed when I want?

Can’t you just put the sphere into the level and then click on the sphere and in the details panel on the right make sure simulate physics or something similar to that is ticked.

Kind Regards!

It’s an AI character, not just a single sphere. I enabled ‘simulate physicsc’ for the sphere inside the character but doesn’t work.

Does anyone know?