Making a traincart go down with physics.

Well here is the problem. I have like a traintrack prop. And I want to get some carts to go down that track but with physics. What is the best way to do that. And as a side question how would i loop that?

Where is your traintrack prop from?

eeh ep 2 but its just a prop.

You need to get a proper prop made for the tracks, and one for the carts.

Or you can use a series of phys entities. Look for tutorials on phys systems.