Give your view on how friction benefits your daily life. You should give several examples supporting your view. Question 2 Figure 1 shows the mine car, and its contents have a total mass of 5000 kg and a center of gravity at G. The coefficient of static friction between the wheels and the tracks is 0.6 when the wheels are locked and 0.3 when the wheels are unlocked. (a) If the wheels are unlocked, determine the minimum force F required to move the mine car. (b) If F is 20 kN, determine whether it is possible for the mine car to move in a condition in which both wheels are locked. If not, suggest the parameter can be changed in the system to move the mine car. Justify your answer with calculation. F 0.9 m .G -0.6 m- Figure 1 -1.5 m- 0.15 m