How can I get the velocity of a part in a direction relative to the part?

I want to get the velocity of a part, but I want it to be in the x or y or z direction relative to the part and not the world, when the part is oriented in a direction other than 0,0,0. How can I get this local space velocity?

https://developer.roblox.com/en-us/articles/object-world-space

part.CFrame:VectorToObjectSpace(part.LinearAssemblyVelocity) will output the velocity vector of the part as relative to the CFrame of the part (in terms of its x,y,z axises)