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Predict/Calculate Two blocks, stacked one on top of the other, can move without friction on the horizontal surface shown in Figure 6-67. The surface between the two blocks is rough, however, with a coefficient of static friction equal to 0.47. (a) If a horizontal force F is applied to the 5.0-kg bottom block, what is the maximum value F can have before the 2.0-kg top block begins to slip? b If the mass of the top block is increased, does the maximum value of F increase, decrease, or stay the same? Explain.
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