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  2. Block-stacking problem - Wikipedia

    en.wikipedia.org/wiki/Block-stacking_problem

    The first nine blocks in the solution to the single-wide block-stacking problem with the overhangs indicated. In statics, the block-stacking problem (sometimes known as The Leaning Tower of Lire (Johnson 1955), also the book-stacking problem, or a number of other similar terms) is a puzzle concerning the stacking of blocks at the edge of a table.

  3. Influence line - Wikipedia

    en.wikipedia.org/wiki/Influence_line

    This method is similar to the tabulated values method, but rather than obtaining a numeric solution, the outcome is an equation in terms of x. [ 5 ] It is important to understanding where the slope of the influence line changes for this method because the influence-line equation will change for each linear section of the influence line.

  4. Graphic statics - Wikipedia

    en.wikipedia.org/wiki/Graphic_statics

    In a broad sense, the term graphic statics is used to describe the technique of solving particular practical problems of statics using graphical means. [1] Actively used in the architecture of the 19th century, the methods of graphic statics were largely abandoned in the second half of the 20th century, primarily due to widespread use of frame structures of steel and reinforced concrete that ...

  5. Statics - Wikipedia

    en.wikipedia.org/wiki/Statics

    Statics is used in the analysis of structures, for instance in architectural and structural engineering. Strength of materials is a related field of mechanics that relies heavily on the application of static equilibrium. A key concept is the center of gravity of a body at rest: it represents an imaginary point at which all the mass of a body ...

  6. List of unsolved problems in statistics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Though there are many approximate solutions (such as Welch's t-test), the problem continues to attract attention [4] as one of the classic problems in statistics. Multiple comparisons: There are various ways to adjust p-values to compensate for the simultaneous or sequential testing of hypotheses. Of particular interest is how to simultaneously ...

  7. Action principles - Wikipedia

    en.wikipedia.org/wiki/Action_principles

    The Newtonian and action-principle forms are equivalent, and either one can solve the same problems, but selecting the appropriate form will make solutions much easier. The energy function in the action principles is not the total energy (conserved in an isolated system), but the Lagrangian, the difference between kinetic and potential energy ...

  8. Statically indeterminate - Wikipedia

    en.wikipedia.org/wiki/Statically_indeterminate

    In statics and structural mechanics, a structure is statically indeterminate when the equilibrium equations – force and moment equilibrium conditions – are insufficient for determining the internal forces and reactions on that structure.

  9. Virtual work - Wikipedia

    en.wikipedia.org/wiki/Virtual_work

    His idea was to convert a dynamical problem into static problem by introducing inertial force. [4] In 1768, Lagrange presented the virtual work principle in a more efficient form by introducing generalized coordinates and presented it as an alternative principle of mechanics by which all problems of equilibrium could be solved.

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