A car, of mass 1200kg tows a trailer, of mass 300kg. They move with a constant acceleration in a straight line on a horizontal road. The trailer is connected to the car by a horizontal tow bar.
A resistance force of magnitude 40N acts on the trailer.
A resistance force of magnitude 200N acts on the car.
The speed of the car and trailer increases from 4ms-1 to 6ms-1 as they travel 50 metres.
A tractive force of magnitude P newtons acts on the car.
a) I've calculated this as 0.2 ms^-2
b) Find the tension in the tow bar.
c) Find P.
So i'm struggling to understand how to calculate tension in general. And also how to get P. Thanks a lot