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# Lecture 25 - ENGR-1100 Introduction to Engineering Analysis...

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ENGR-1100 Introduction to Engineering Analysis Lecture 25 Notes courtesy of: Prof. Yoav Peles

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Homework Assignment (due next class) Problem 9-97 Problem 9-100 Problem 9-126
Today Lecture outline Belt friction Flat belts V-belts

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Belt friction
Flat belt F r = 0 2 ∆θ       - T sin 2 ∆θ       -(T + T) sin =0 P P = 2 ∆θ    2 ∆θ    (a)

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2 ∆θ    (T + T) cos 2 ∆θ - T cos - F = 0 F θ = 0 T c 2 ∆θ    (b)
Assuming slip is impending F= μ s P Tcos( ∆θ /2)= μ s sin( ∆θ /2)+ μ s ∆Τ sin( ∆θ /2) Combining equation (a) and (b) yields: P = 2 T s i n 2 ∆θ       2 ∆θ       (a) T c o s = 2 ∆θ    (b)

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c o s ( θ / 2 ) = μ T   ∆θ  ( 29 sin / 2 / 2 ∆θ ∆θ s T 2 μ∆ ( 29 sin / 2 / 2 ∆θ ∆θ Dividing by ∆θ 0 lim ∆θ→ T ∆θ dt d θ lim cos χ 1
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Lecture 25 - ENGR-1100 Introduction to Engineering Analysis...

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