knocking sound on front right of car

Would you try explaing again? noise when driving? did wheel stop or noise? what kept spinning?

i should of explained better, but not car smart so ill try a little better. the knocking sound isn't constant but have heard it and thought it was the brakes, so when we checked it the brakes were good, but you can hear something spinning behind the front passenger tire when we spun the tire not sure where it is coming from but we can hear it spinning. it might even be in the back of the engine can't pinpoint where the sound is coming from.

Nois diagnosis over internet about impossible so take rim off turn rotor , inspect axle ,wheel bearing and strut. May need a professional take a look