In Fig. 6-24, a force acts on a block weighing 45 N. The
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In Fig. 6-24, a force acts on a block weighing 45 N. The block is initially at rest on a plane inclined at angle u " 153 to the horizontal. The positive direction of the x axis is up the plane. Between block and plane, the coefficient of static friction is ms " 0.50 and the coefficient of kinetic friction is mk " 0.34. In unit-vector notation, what is the frictional force on the block from the plane when is (a) ($5.0 N) , (b) ($8.0 N) , and (c) ($15 N) ?
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