Question 3 A trailer truck with a 2000-kg cab and an 8000-kg trailer is travelling on a level road at 90 km/h as shown in Fig. 3. The brakes on the trailer fail and the antiskid system of the cab provides the maximum possible force which will not cause the wheels of the cab to slide. Knowing that the coefficient of static friction is 0.65, determine (a) the shortest time for the trailer truck to come to a stop, and (b) the force in the coupling during that time. 90 km/h 8000 kg 2000 kg RAF INT Fig. 3