Block C has mass of 100 kg and is confined between two walls by smooth rollers.

Question

Block C has mass of 100 kg and is confined between two walls by smooth rollers. The block rests on a 50 kg spool. A cable is wrapped around the spool's core, with force P applied on the cable, causing impending motion of spool. Coefficients of static friction at contact points A and B are mu A = 0.6 and mu B = 0.3, respectively. State the cases of impending motion as force P is applied on the cable around the core. Assuming one of the stated cases of impending motion, draw Free Body Diagrams for the Block C and the Spool, separately. Label assumed state of impending motion. Determine the minimum force P needed to move the spool. Justify your answer.

Explanation / Answer

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