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Unformatted text preview: If no force is applied, clearly there is no static frictional force. As more force is applied, the static frictional force increases until it reaches a certain maximum value; once the horizontal force exceeds the maximum frictional force the block begins to move. The frictional force, defined as F s max , is conveniently proportional to the normal force between the two surfaces: F s max = s F N...
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