A heavy truck of weight 400kN is shown in Fig. 4, parked on an extremely steep hill of slope theta with its hand
brake applied to the rear brakes only. Determine the reactions between the road and the truck’s wheels in
terms of theta. Find the steepest value of theta that the truck can manage without sliding if the coefficient of friction
between the tyres and the slippery road is m = 0.8. Would it be better if the truck were parked facing downhill?
Could someone explain how to solve this problem? Cheers.