Physics 170 Worksheet 6: Friction W6-1. The refrigerator weighs 180 lb and rests on a tile floor. The coefficient of static friction UR between the refrigerator and the floor is 0.25. The man weighs 150 lb. The coefficient of static friction um between his shoes and the floor is 0.6. The man pushes horizontally on the refrigerator. Determine whether the man can move the refrigerator. If so, does the refrigerator slip or tip? 3 ft 0 4 ft G +-1.5 ft- 3 ft A
W6-2. The uniform 6 kg slender rod rests on the top center of the 3 kg block. The coefficients of static friction at A, B and Care ulA = 0.4, ulB = 0.6, ulc = 0.3. Determine the largest couple moment M, which can applied to the rod without causing motion of the rod. 0 800 mm M B 300 mm A - 600 mm- 100 mm 100 mm
W6-3. Determine the smallest horizontal force required to lift the 100 kg cylinder. The coefficients of static friction at A and B and between the wedge and the ground are ULA = 0.6, UlB = 0.2, ulc = 0.3. 0.5 m A 10° P B C