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(Solved): In the figure below, two blocks of weights WA and WB are connected by a rope. The static friction co ...



In the figure below, two blocks of weights WA and WB are connected by a rope. The static friction coefficient between the surface and blocks are uA and uB. You can ignore the friction between rope and pulley.

  1. ???Find the smallest WB / WA for the system to be in static equilibrium (WB about to slide up).
  2. ???Find the biggest WB / WA for the system to be in static equilibrium (WB about to slide down).
  3. ???Recalculate part (a) and part (b) for uA =0.3, uB=0.1, theta A = 30°, and theta B = 45°



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a) Free Body Diagram for Weight Wb : TN1Wbub*NTheta B ?Fx=0;WBsin??B=N1?Fy=0;WBcos??B+WBsin?
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