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  2. Pendulum (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Pendulum_(mechanics)

    Deviation of the "true" period of a pendulum from the small-angle approximation of the period. "True" value was obtained numerically evaluating the elliptic integral. Figure 4. Relative errors using the power series for the period. Figure 5. Potential energy and phase portrait of a simple pendulum.

  3. Periodic function - Wikipedia

    en.wikipedia.org/wiki/Periodic_function

    A nonzero constant P for which this is the case is called a period of the function. If there exists a least positive [2] constant P with this property, it is called the fundamental period (also primitive period, basic period, or prime period.) Often, "the" period of a function is used to mean its fundamental period.

  4. Spherical pendulum - Wikipedia

    en.wikipedia.org/wiki/Spherical_pendulum

    In physics, a spherical pendulum is a higher dimensional analogue of the pendulum. It consists of a mass m moving without friction on the surface of a sphere . The only forces acting on the mass are the reaction from the sphere and gravity .

  5. Elastic pendulum - Wikipedia

    en.wikipedia.org/wiki/Elastic_pendulum

    In physics and mathematics, in the area of dynamical systems, an elastic pendulum [1] [2] (also called spring pendulum [3] [4] or swinging spring) is a physical system where a piece of mass is connected to a spring so that the resulting motion contains elements of both a simple pendulum and a one-dimensional spring-mass system. [2]

  6. Kater's pendulum - Wikipedia

    en.wikipedia.org/wiki/Kater's_pendulum

    The small weight (b) was adjusted with the adjusting screw, and the process repeated until the pendulum had the same period when swung from each pivot. By putting the measured period T, and the measured distance between the pivot blades L, into the period equation (1), g could be calculated very accurately. Kater performed 12 trials. [1]

  7. Conical pendulum - Wikipedia

    en.wikipedia.org/wiki/Conical_pendulum

    Monumental conical pendulum clock by Farcot, 1878. A conical pendulum consists of a weight (or bob) fixed on the end of a string or rod suspended from a pivot.Its construction is similar to an ordinary pendulum; however, instead of swinging back and forth along a circular arc, the bob of a conical pendulum moves at a constant speed in a circle or ellipse with the string (or rod) tracing out a ...

  8. Duffing equation - Wikipedia

    en.wikipedia.org/wiki/Duffing_equation

    The Duffing equation (or Duffing oscillator), named after Georg Duffing (1861–1944), is a non-linear second-order differential equation used to model certain damped and driven oscillators.

  9. Mathieu function - Wikipedia

    en.wikipedia.org/wiki/Mathieu_function

    Mathieu's differential equations appear in a wide range of contexts in engineering, physics, and applied mathematics. Many of these applications fall into one of two general categories: 1) the analysis of partial differential equations in elliptic geometries, and 2) dynamical problems which involve forces that are periodic in either space or time.