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VIBRATION

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

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  1. VIBRATION Drs. Supriyono Koes H, M.Pd, MA

  2. Objectives • To identify themovement of vibration with an experiment. • To determine theamplitude, period, and frequency of a vibration.

  3. Have you ever played a swing?

  4. Vibration = Simple harmonic motion 1 vibration = movement from A, O, B, O, to A. A B O

  5. 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.

  6. 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

  7. 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.

  8. 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.

  9. REFLECTION • Write down a sentence that reflects your feeling after doing everything in this lesson.

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