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Pendulums. General Physics. Periodic Motion. A motion that is regular and repeating Examples Circular motion Mass bouncing up and down on a spring Pendulums. Simple Harmonic Motion (SHM). motion that returns an object to its rest position

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Pendulums

Pendulums

  • General Physics


Periodic motion
Periodic Motion

  • A motion that is regular and repeating

  • Examples

    • Circular motion

    • Mass bouncing up and down on a spring

    • Pendulums


Simple harmonic motion shm
Simple Harmonic Motion (SHM)

  • motion that returns an object to its rest position

  • caused by a restoring force that is directly proportional to the objects displacement


Measuring the motion of a pendulum
Measuring the Motion of a Pendulum

  • Bob:

    • the mass that at is hung on the end of a string that makes up the pendulum

    • measured in kg

  • Length:

    • Measured from point of attachment to center of bob in the rest position.

    • measured in meters


Measuring the motion of a pendulum1
Measuring the motion of a pendulum

  • Rest position:

    • Also known as the equilibrium position

    • Located at bottom of swing

  • Period:

    • the time for one complete cycle (forward and back to same position)

    • symbol: T

    • unit: seconds


Measuring the motion of a pendulum2
Measuring the Motion of a Pendulum

  • Frequency:

    • The number of complete cycles in a period of time

    • Symbol: f

    • Unit: 1/s or Hertz


Measuring the motion of a pendulum3
Measuring the Motion of a Pendulum

  • Amplitude:

    • The maximum displacement from the rest position.

    • Symbol: A

    • Unit: m

    • We will measure the amplitude of a pendulum by using a protractor to measure the degrees that the bob is pulled back from the rest position.


Equation to find period
Equation to find Period

T=2Π(l/g)1/2

l= length

g=acceleration due to gravity