A train consists of a locomotive and two carriages. The mass of the locomotive is 5600 kg and the mass brakes. The train comes to rest after travelling 360 m. The resistance forces throughout this motion are of each carriage is 3200 kg. The train is moving at a speed of 40 km h¹ when the driver applies the constant, 700 N on the locomotive and 400 N on each carriage. a Find the force in the coupling between the first carriage and the locomotive. b Is this force a tension or a thrust?​