Transcription of Chap. 8 Friction - 國立臺灣大學
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Chap. 8 Friction - 國立臺灣大學
Chap. 8 Friction8-1-2 Chapter OutlineCharacteristics of Dry FrictionProblems Involving Dry FrictionWedgesFrictional Forces on ScrewsFrictional Forces on Flat BeltsFrictional Forces on Collar Bearings, Pivot Bearings, and DisksFrictional Forces on Journal BearingsRolling Resistance8-1-3 APPLICATIONSIn designing a brake system for a bicycle, car, or any other vehicle, it is important to understand the frictional forces involved. For an applied force on the brake pads, how can we determine the magnitude and direction of the resulting Friction force?8-1-4 APPLICATIONS (continued)Consider pushing a box as shown here. How can you determine if it will slide, tilt, or stay in static equilibrium?
placed on the belt without causing the belt to slip at the drive wheel A which is rotating with a constant angular velocity. Wheel B is free to rotate. Also, find the corresponding torsional moment M that must be supplied to wheel A. The conveyor belt is pre-tensioned with the 1500-N horizontal force. The coefficient of kinetic friction between the
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