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A 7.40-kg block is placed on top of a 12.5-kg block that rests on a frictionless table. The coefficient of static friction between the two blocks is 0.610. What is the maximum horizontal force that can be applied before the 7.40-kg block begins to slip relative to the 12.5-kg block, if the force is applied to (a) the more massive block and(b) the less massive block?

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  1. force friction between two blocks:
    maximum acceleration: 44.3=7.40*a or
    a= 5.99m/s^2

    a) force=ma
    b) force= 7.4*5.99

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