Maths ~ mechanics newtons law help

The question: A car of mass M pulls a trailer of mass m along a straight level road at constant speed. The resistance to motion on the car is 5000N and the resistance to motion on the trailer is 1000N.

I am asked to find the tension on the tow bar, am i right in saying that it is 0N as there is no acceleration with F=ma?

Thanks

What force is pulling the trailer then?

I was thinking that because it is in equalibrium the forces cancel to 0

The question: A car of mass M pulls a trailer of mass m along a straight level road at constant speed. The resistance to motion on the car is 5000N and the resistance to motion on the trailer is 1000N.
I am asked to find the tension on the tow bar, am i right in saying that it is 0N as there is no acceleration with F=ma?
Thanks

I was thinking that because it is in equilibrium the forces cancel to 0

so it would be 1000 then?