Statics: dry friction.
Two boxes are attached to a pulley with coefficient of static friction of us = .25. The static coefficient of friction between box 1 and the concrete is us = .62. Box 1 is being pulled horizontally and box 2 is being suspended vertically. When the boxes are on the verge of moving in the direction of the force P, calculate:
W1 = 3 lb
W2 = 11 lb
1 - The tension in the cable on the side of the pulley attached to box 2
2 -The tension in the cable on the side of the pulley attached to box 1.
3 -The maximum frictional force opposing the motion of box 1.
4 - The force P
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