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The friction force is the force exerted by a surface when an object exerts force across it.   A coefficient of friction(μ) is a scalar proportion of two objects and their normal reaction. There are 2 cases: Is the dynamic/kinetic coefficient of friction when either or both objects are dynamic. IsContinue Reading

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Four possible perspectives(ways) to produce matrix multiplications(which give the same result): Ordered Collection of Dot Products (result matrix is built elementwise): Left matrix is rows, right matrix is columns. Each element is the dot product of a corresponding row from the left matrix and the column from the right matrix.Continue Reading