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  2. Center of percussion - Wikipedia

    en.wikipedia.org/wiki/Center_of_percussion

    Note that P, the rotation axis, need not be at the end of the beam, but can be chosen at any distance . Length b + p {\displaystyle b+p} also defines the center of oscillation of a physical pendulum , that is, the position of the mass of a simple pendulum that has the same period as the physical pendulum.

  3. Barton's pendulums - Wikipedia

    en.wikipedia.org/wiki/Barton's_pendulums

    A schematic diagram of the Barton's pendulums experiment. First demonstrated by Prof Edwin Henry Barton FRS FRSE (1858–1925), Professor of Physics at University College, Nottingham, who had a particular interest in the movement and behavior of spherical bodies, the Barton's pendulums experiment demonstrates the physical phenomenon of resonance and the response of pendulums to vibration at ...

  4. Foucault pendulum - Wikipedia

    en.wikipedia.org/wiki/Foucault_pendulum

    The Foucault pendulum or Foucault's pendulum is a simple device named after French physicist Léon Foucault, conceived as an experiment to demonstrate the Earth's rotation. If a long and heavy pendulum suspended from the high roof above a circular area is monitored over an extended period of time, its plane of oscillation appears to change ...

  5. Rayleigh–Lorentz pendulum - Wikipedia

    en.wikipedia.org/wiki/Rayleigh–Lorentz_pendulum

    Rayleigh–Lorentz pendulum (or Lorentz pendulum) is a simple pendulum, but subjected to a slowly varying frequency due to an external action (frequency is varied by varying the pendulum length), named after Lord Rayleigh and Hendrik Lorentz. [1] This problem formed the basis for the concept of adiabatic invariants in mechanics. On account of ...

  6. Pendulum (mechanics) - Wikipedia

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

    Note that the path of the pendulum sweeps out an arc of a circle. The angle θ is measured in radians , and this is crucial for this formula. The blue arrow is the gravitational force acting on the bob, and the violet arrows are that same force resolved into components parallel and perpendicular to the bob's instantaneous motion.

  7. Pendulum - Wikipedia

    en.wikipedia.org/wiki/Pendulum

    "Simple gravity pendulum" model assumes no friction or air resistance. A pendulum is a device made of a weight suspended from a pivot so that it can swing freely. [1] When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position.

  8. Cavendish experiment - Wikipedia

    en.wikipedia.org/wiki/Cavendish_experiment

    For the first 3 experiments the period was about 15 minutes and for the next 14 experiments the period was half of that, about 7.5 minutes. The period changed because after the third experiment Cavendish put in a stiffer wire. The torsion coefficient could be calculated from this and the mass and dimensions of the balance.

  9. Phase portrait - Wikipedia

    en.wikipedia.org/wiki/Phase_portrait

    Simple pendulum, see picture (right). Simple harmonic oscillator where the phase portrait is made up of ellipses centred at the origin, which is a fixed point. Damped harmonic motion, see animation (right). Van der Pol oscillator see picture (bottom right).

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