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  2. 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.

  3. Kater's pendulum - Wikipedia

    en.wikipedia.org/wiki/Kater's_pendulum

    Kater built a pendulum consisting of a brass rod about 2 meters long, 1 + 1 ⁄ 2 inches wide and one-eighth inch thick, with a weight (d) on one end. [1] [9] For a low friction pivot he used a pair of short triangular 'knife' blades attached to the rod. In use the pendulum was hung from a bracket on the wall, supported by the edges of the ...

  4. Pendulum (mechanics) - Wikipedia

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

    The short violet arrow represents the component of the gravitational force in the tangential axis, and trigonometry can be used to determine its magnitude. Thus, F = − m g sin ⁡ θ = m a , so a = − g sin ⁡ θ , {\displaystyle {\begin{aligned}F&=-mg\sin \theta =ma,\qquad {\text{so}}\\a&=-g\sin \theta ,\end{aligned}}} where g is the ...

  5. Gravimetry - Wikipedia

    en.wikipedia.org/wiki/Gravimetry

    Gravimeter with variant of Repsold–Bessel pendulum An Autograv CG-5 gravimeter being operated. A gravimeter is an instrument used to measure gravitational acceleration. Every mass has an associated gravitational potential. The gradient of this potential is a force. A gravimeter measures this gravitational force.

  6. Cavendish experiment - Wikipedia

    en.wikipedia.org/wiki/Cavendish_experiment

    Definition radians: Deflection of torsion balance beam from its rest position F: N: Gravitational force between masses M and m: G: m 3 kg −1 s −2: Gravitational constant m: kg: Mass of small lead ball M: kg: Mass of large lead ball r: m: Distance between centers of large and small balls when balance is deflected L: m

  7. 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]

  8. Wilberforce pendulum - Wikipedia

    en.wikipedia.org/wiki/Wilberforce_pendulum

    A Wilberforce pendulum can be designed by approximately equating the frequency of harmonic oscillations of the spring-mass oscillator f T, which is dependent on the spring constant k of the spring and the mass m of the system, and the frequency of the rotating oscillator f R, which is dependent on the moment of inertia I and the torsional ...

  9. 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 ...