'Normal contact force' presentation slideshows

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????? ???????????. ???? ???. ????? (Distinct Element Method, DEM). A numerical technique. ???. DEM ??????. Meso. Macro. Micro. ?????????. Hertz ???????????. Contact models of two rigid disks in DEM (Cundall & Strack 1979 ). Start. Time step loop. Initial state. ( t=t+ ? t).

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Forces (Part 1)

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Forces (Part 2)

Forces (Part 2). Free Body Diagrams. A free body diagram is a diagram used to describe the forces acting on an object It only describes the forces acting on ONE single object, and not other objects connected to it Forces are represented by arrows.

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Nuffield Free-Standing Mathematics Activity Investigating friction

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Solve friction problems

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