1 A trailer of mass 600 kg is attached to a car of mass 1100 kg by a light rigid horizontal tow-bar. The car and trailer are travelling along a horizontal straight road with acceleration \(0.8 \mathrm {~m} \mathrm {~s} ^ { - 2 }\).
- Given that the force exerted on the trailer by the tow-bar is 700 N , find the resistance to motion of the trailer.
- Given also that the driving force of the car is 2100 N , find the resistance to motion of the car.