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  2. Simple harmonic motion - Wikipedia

    en.wikipedia.org/wiki/Simple_harmonic_motion

    In the small-angle approximation, the motion of a simple pendulum is approximated by simple harmonic motion. The period of a mass attached to a pendulum of length l with gravitational acceleration g {\displaystyle g} is given by T = 2 π l g {\displaystyle T=2\pi {\sqrt {\frac {l}{g}}}}

  3. Harmonic oscillator - Wikipedia

    en.wikipedia.org/wiki/Harmonic_oscillator

    A simple pendulum exhibits approximately simple harmonic motion under the conditions of no damping and small amplitude. Assuming no damping, the differential equation governing a simple pendulum of length l {\displaystyle l} , where g {\displaystyle g} is the local acceleration of gravity , is d 2 θ d t 2 + g l sin ⁡ θ = 0. {\displaystyle ...

  4. Pendulum (mechanics) - Wikipedia

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

    The motion is simple harmonic motion where θ 0 is the amplitude of the oscillation (that is, the maximum angle between the rod of the pendulum and the vertical). The corresponding approximate period of the motion is then

  5. Bertrand's theorem - Wikipedia

    en.wikipedia.org/wiki/Bertrand's_theorem

    The equation of motion for the ... To solve for the orbit under a radial harmonic-oscillator ... The solutions of these simple harmonic oscillator equations are all ...

  6. Balance spring - Wikipedia

    en.wikipedia.org/wiki/Balance_spring

    The solution to this equation of motion for the balance is simple harmonic motion; i.e., a sinusoidal motion of constant period: = ⁡ + ⁡ () Thus, the following equation for the periodicity of oscillation can be extracted from the above results: T = 2 π I κ {\displaystyle T=2\pi {\sqrt {\frac {I}{\kappa }}}\,} This period controls the rate ...

  7. Rayleigh–Ritz method - Wikipedia

    en.wikipedia.org/wiki/Rayleigh–Ritz_method

    Simple harmonic motion theory says that the velocity at the time when deflection is zero, is the angular frequency times the deflection (y) at time of maximum deflection. In this example the kinetic energy (KE) for each mass is 1 2 ω 2 Y 1 2 m 1 {\textstyle {\frac {1}{2}}\omega ^{2}Y_{1}^{2}m_{1}} etc., and the potential energy (PE) for each ...

  8. Oscillation - Wikipedia

    en.wikipedia.org/wiki/Oscillation

    The time taken for an oscillation to occur is often referred to as the oscillatory period. The systems where the restoring force on a body is directly proportional to its displacement, such as the dynamics of the spring-mass system, are described mathematically by the simple harmonic oscillator and the regular periodic motion is known as simple ...

  9. Method of averaging - Wikipedia

    en.wikipedia.org/wiki/Method_of_averaging

    Figure 2: A simple harmonic oscillator with small periodic damping term given by ¨ + ⁡ ˙ + =, =, ˙ =; =.The numerical simulation of the original equation (blue solid line) is compared with averaging system (orange dashed line) and the crude averaged system (green dash-dotted line). The left plot displays the solution evolved in time and ...