Problem 2.46 - Problem 2.46 Given: Block moving on incline...

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Problem 2.46 [Difficulty: 2] Given: Block moving on incline on oil layer Find: Speed of block when free, pulled, and pushed f θ N x x U y d W Solution: Governing equations: τ yx μ du dy = Σ F x Ma x = Assumptions: Laminar flow The given data is M1 0 k g = WM g = W 98.066 N = w 250 mm = d 0.025 mm = θ 30 deg = F7 5 N = μ 10 1 Ns m 2 = Fig. A.2 SAE 10-39 @30 o C Equation of motion Σ F x x = 0 = so Ff W sin θ () 0 = The friction force is f τ yx A = μ du dy A = μ U d w 2 = Hence for uphill motion
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