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Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege

Engineering 36. Lab-26 AppB Belt Friction. Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu. Sticky Collar. k s = 1.5 kN/m. µ s = 40%. Collar B of weight W can slide along bearing Rod Spring UNstretched for θ = 0°

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Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege

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  1. Engineering 36 Lab-26 AppBBeltFriction Bruce Mayer, PE Licensed Electrical & Mechanical EngineerBMayer@ChabotCollege.edu

  2. Sticky Collar ks = 1.5 kN/m µs = 40% • Collar B of weight W can slide along bearing Rod • Spring UNstretched for θ = 0° • Find Range of Values for W for equilibrium when • θ = 20° and θ = 30°

  3. Rotating Roller • Bucket A connected to Block C by cable that passes over Roller B • Drum B rotates CounterClockwise slowly at a constant rate • The Coefficients of Friction at All Surfaces • µs = 35% µk = 25% • Find smallest Bucket Wt, W, for which Block C will • a) Remain at REST • b) be ABOUT to move UP the InCline • c) Continue to move UP the Ramp at a CONSTANT speed

  4. Sticky Collar 85kg µs = 40% • Given Geometry and 85kg Motor; the mount has negligible weight • The motor Wt on the Pivoted mount maintains the tension in the Flat Drive Belt • µs for the Belt and Drums A & B is 0.40 • Find Largest Torque, T, which can be transmitted to Drum B when Drum A rotates Clockwise

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