ch06-p017 - 17. (a) The free-body diagram for the block is...

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17. (a) The free-body diagram for the block is shown below. G F is the applied force, N F G is the normal force of the wall on the block, G f is the force of friction, and mg G is the force of gravity. To determine if the block falls, we find the magnitude f of the force of friction required to hold it without accelerating and also find the normal force of the wall on the block. We compare f and μ s F N . If f < s F N , the block does not slide on the wall but if f > s F N , the block does slide. The horizontal component of Newton’s second
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