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Introduction (8-1)       | 
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States of Friction (8-2)       | 
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Example (8-3)       | 
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Example (8-4)       | 
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Example (8-5)       | 
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Example (8-6)       | 
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Example (8-7)       | 
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Example (8-8)       | 
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Example (8-9)       | 
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Example (8-10)       | 
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Example (8-11)       | 
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Example (8-12)       | 
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Example (8-13)       | 
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Example (8-14)       | 
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Example (8-15)       | 
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