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VIBRATION. Drs. Supriyono Koes H, M.Pd, MA. Objectives. To identify the movement of vibration with an experiment. To determine the amplitude, period, and frequency of a vibration. Have you ever played a swing?. Vibration = Simple harmonic motion.

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vibration

VIBRATION

Drs. Supriyono Koes H, M.Pd, MA

objectives
Objectives
  • To identify themovement of vibration with an experiment.
  • To determine theamplitude, period, and frequency of a vibration.
vibration simple harmonic motion
Vibration = Simple harmonic motion

1 vibration = movement from A, O, B, O, to A.

A

B

O

some definitions
Some definitions
  • Vibration is an oscillating movement through a point of equilibrium
  • Displacement is any distance between the vibrating thing and its equilibrium point.
  • Maximum displacement is called amplitude of a vibration.
  • Period (T)is the time needed to do one vibration.
  • Frequency (f)of vibration is the number of vibrations which happens every second.
problems
Problems
  • Is the period of a pendulum influenced by its amplitude?
  • Is the period of a pendulum influenced by its thread length?
  • Is the period of a pendulum influenced by its mass?
  • DO AN EXPERIMENT
solving the problem
Solving the problem
  • What is your task?
    • Group 1 and 4 do problem 1.
    • Group 2 and 5 do problem 2.
    • Group 3 and 6 do problem 3.
  • How long will you do your experiment?
    • Your group will do an experiment for 20 minutes.
  • What will you do after having done the experiment?
    • Your group will give presentation to others.
conclusion
CONCLUSION
  • The period of a pendulumis not influenced by its amplitude.
  • The longer the thread, the longer the period of pendulum.
  • The period of a pendulumis not influenced by its mass.
reflection
REFLECTION
  • Write down a sentence that reflects your feeling after doing everything in this lesson.