The mine car and its contents have a total mass of 7.8 Mg and a center of gravity at G. The coefficient of static friction between the wheels and the tracks is , = 0.4 when the wheels are locked. The brakes at both A and B are locked. (Figure 1) Part A Find the normal force acting on the front wheels at B. Express your answer to three significant figures and include the appropriate units. NB = Submit HA Value Request Answer Units ?

The mine car and its contents have a total mass of 7.8 Mg and a center of gravity at G. The coefficient of static friction between the wheels and the tracks is , = 0.4 when the wheels are locked. The brakes at both A and B are locked. (Figure 1) Part A Find the normal force acting on the front wheels at B. Express your answer to three significant figures and include the appropriate units. NB = Submit HA Value Request Answer Units ?