Compound Pendulum (Steel C.P.)


Compound Pendulum (Steel C.P.) is a rigid body that oscillates about a horizontal axis under the influence of gravity. Unlike a simple pendulum, which consists of a mass suspended by a string, a compound pendulum has distributed mass and can be made from materials such as steel for higher rigidity and durability.

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Key Characteristics of a Steel Compound Pendulum:

  1. Material: Steel

    • Provides high strength and consistent mechanical properties.
  2. Oscillation Mechanism:

    • The pendulum swings about a fixed pivot under gravity.
    • Its motion is governed by rotational inertia (moment of inertia, I) and the center of mass position.
  3. Period of Oscillation:

    • Given by: T=2πImgdT = 2\pi \sqrt{\frac{I}{mgd}} where:
      • II = Moment of inertia about the pivot
      • mm = Mass of the pendulum
      • gg = Acceleration due to gravity (9.81 m/s²)
      • dd = Distance from the pivot to the center of mass
  4. Center of Percussion (C.P.):

    • A special point where impact forces do not cause rotational motion.
  5. Adjustable Pivot:

    • Some experimental setups allow the pivot point to be changed to study the effects on oscillation.
  6. Practical Applications:

    • Used in physics experiments to determine acceleration due to gravity (g).
    • Helps in analyzing rotational motion and damping effects in rigid bodies.
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