39. The 68 kg weight is attached to a rope that passes over the fixed cylinders A and B. The coefficient of static friction between the rope and the cylinders is 0.3. Determine the smallest force P that keeps the system at rest. 100 mmy A 400 mm 100 mafn 68 kg 138.67 N c. 158.67 N a. b. 148.67 N d. 168.67 N

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