they CholliCement codand (notdell 4. Systems undergoing harmonic motion contain energy that oscillates between different forms. What forms of energy are changing in the systems described below? a. a simple pendulum. (o. = 0) mulubasa >bob ar 2 per b. a mass on a spring that is sliding on a frictionless, horizontal surface. 5. If an oscillator has a frequency of 60 Hz, how many complete oscillations take place in 2 s? 6. A quartz crystal in a watch has a period of 0.00350 s. What is its frequency in hertz? 7. An object has a frequency of 50 Hz. What is the period? 8. The highest and lowest points of a mass oscillating on a spring are 28 cm apart. What is the amplitude of the movement? 9. A spring mass system moves from one extreme of its motion to the other once every second. What is the frequency of the system?Name: Dillon b Period: L Simple Harmonic Motion (Oscillation) Practice 1. Which of these periodic motions are simple harmonic? aformed anlog sortu a. a child swinging on a playground swing (0= 45) anignsilo sis valens to armol b. a CD rotating in a player mulubaaq s c. jan oscillating clock pendulum (0 = 109) 2. A swing is observed to move back and forth 12 times in 30 s. a. What is the period of the motion? b. What is the frequency of the motion