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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 Drs. Supriyono Koes H, M.Pd, MA
Objectives • To identify themovement of vibration with an experiment. • To determine theamplitude, period, and frequency of a vibration.
Vibration = Simple harmonic motion 1 vibration = movement from A, O, B, O, to A. A B O
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 • 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 • 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 • 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 • Write down a sentence that reflects your feeling after doing everything in this lesson.