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Figure 6-1 The Origin of Friction. Figure 6-2 Kinetic Friction and the Normal Force. Friction. Normal force – a force that pushes two surfaces together, and is perpendicular to the surfaces. Friction. Table 6-1 Typical Coefficients of Friction. Figure 6-3 Static Friction.
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Friction Normal force – a force that pushes two surfaces together, and is perpendicular to the surfaces.