The three blocks with weights as shown in the figure are placed on a 20o incline so that they are in contact with each other and at rest. Determine which, if any, of the blocks will move and the friction force acting under each. Assume that under blocks A and C, the coefficients of friction are fs = 0.50 and fk = 0.40 while under B they are fs = 0.30 and fk = 0.20 The three blocks with weights as shown in the figure are placed on a 20° incline so thatthey are in contact with each other and at rest. Determine which, if any, of the blocks willmove and the friction force acting under each. Assume that under blocks A and C, thecoefficients of friction are fs = 0.50 and f = 0.40 while under B they are f = 0.30 and f =0.20B20 lb60 lb40 1b20

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The three blocks with weights as shown in the figure are placed on a 20° incline so that they are in contact with each other and at rest. Determine which, if any, of the blocks will move and the friction force acting under each. Assume that under blocks A and C, the coefficients of friction are f; = 0.50 and f = 0.40 while under B they are f; = 0.30 and fi = 0.20 20 lb 40 1b 60 lb 20

The three blocks with weights as shown in the figure are placed on a 20° incline so that they are in contact with each other and at rest. Determine which, if any, of the blocks will move and the friction force acting under each. Assume that under blocks A and C, the coefficients of friction are f; = 0.50 and f = 0.40 while under B they are f; = 0.30 and fi = 0.20 20 lb 40 1b 60 lb 20

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