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Problem 2.41 - Problem 2.41[Difficulty 2 Given Velocity...

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Problem 2.41 [Difficulty: 2] Given: Velocity distribution between parallel plates Find: Force on lower plate Solution: Basic equations F τ yx A = τ yx μ du dy = du dy d dy u max 1 2 y h 2 = u max 4 h 2 2 y = 8 u max y h 2 = so τ yx 8 μ u max y h 2 = and F 8 A μ u max y h 2 = At the lower surface y h 2 = and h 0.1 mm = A 1 m 2 = u max 0.05 m s =
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