Engineering Mechanics

7.

7.1.

Characteristics of Dry Friction

7.1.1.

Coulomb Friction Model

7.1.2.

Laws of Friction

7.1.2.1.

Proportionality to Normal Force

7.1.2.2.

Independence of Contact Area

7.1.3.

Coefficient of Friction

7.1.3.1.

Static Coefficient

7.1.3.2.

Kinetic Coefficient

7.1.4.

Angle of Friction

7.1.4.1.

7.1.4.2.

7.2.

Dry Friction Problems

7.2.1.

Static vs Kinetic Friction

7.2.2.

Impending Motion Analysis

7.2.2.1.

Limiting Equilibrium

7.2.2.2.

Critical Conditions

7.2.3.

Motion vs Equilibrium

7.2.4.

Tipping vs Slipping

7.2.4.1.

Stability Analysis

7.2.4.2.

Critical Height Calculations

7.3.

7.3.1.

Self-Locking Wedges

7.3.2.

7.3.3.

Equilibrium Conditions

7.4.

Screw Mechanics

7.4.1.

Thread Geometry

7.4.2.

Torque Requirements

7.4.3.

Efficiency Calculations

7.4.4.

Self-Locking Conditions

7.5.

Bearing and Axle Friction

7.5.1.

Journal Bearings

7.5.2.

Thrust Bearings

7.5.3.

Frictional Moment

7.5.4.

7.6.

7.6.1.

Flat Belt Analysis

7.6.2.

Capstan Equation

7.6.3.

Rope and Pulley Systems

7.6.4.

Power Transmission

7.7.

Rolling Resistance

7.7.1.

Deformation Effects

7.7.2.

Rolling Resistance Coefficient

7.7.3.

Energy Considerations

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6. Internal Forces

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8. Center of Gravity, Centroid, and Moment of Inertia