Friction Simulation Q U ESTI O N 1 According to your textbook, how does pk compare to NS . a, Hk Ils- QUESTION 2 How do you expect pk to depend on the size of the contact area between the two sliding surface ? a_ None of the above b. pk is inversely proportional to size of the contact area between the two sliding surface 6. pk is independent to size of the contact area between the two sliding surface d, All of the above 6. pk is directly proportional to size of the contact area between the two sliding surface QUESTION 3 How do you expect the coefcient of friction to depend on the normal force? For example, do you expect ilk to increase, decrease, or remain constant as the normal force is increased? a. All of the above b. pk is independent to the normal force 0_ pk is directly proportional to the normal force d, None of the above L. pk is inversely proportional to the normal force