The truck has a mass of 1.25 Mg and a center of mass at G. Determine the greatest load it can pull if: (a) the truck has rear-wheel drive while the front wheels are free to roll. (b) the truck has four-wheel drive. The coefficient of static friction between the wheels and the ground is u.=0.5, and between the crate and the ground, it is H.-0.4. Note: Rear-wheel drive means the rear wheels must slip and four-wheel drive all four wheels must slip. So in this problem, the wheels must be on the verge of slipping, max. friction force. 800 mm G B 600 mm -1.5 menim 10