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12.14 (Connect Problems 1-3)

The two blocks shown are originally at rest. Neglecting the masses of the

pulleys and the effect of friction in the pulleys and knowing that the coefficients

of friction between the blocks and the inclines are us = 0.25 and μ = 0.2,

determine (a) the acceleration of each block, (b) the tension in the cable.

1

200 lb

A

20⁰

90°

300 lb

Fig: 1