Directions: On this worksheet you will practice reading vibration graphs and correctly answering questions based on its period and frequency.

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Question 1 The teal-graph shown below tracks the vibrations of a pendulum using a sonic ranger. You are given that the first crest occured at 4 seconds and the last crest occured at 13.9 seconds.Based on the first crest, how many complete vibrations are shown on the graph?

10.5 10.75 9.5 10 9

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Question 2 What was the pendulum's period?

1.1 x 10^{0} seconds9.9 x 10^{0} seconds9.09 x 10^{-1} hz1.01 x 10^{0} hz9.9 x 10^{-1} seconds

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Question 3 What was the pendulum's frequency?

9.9 x 10^{-1} seconds1.1 x 10^{0} seconds1.01 x 10^{0} hz9.09 x 10^{-1} hz

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Question 4 Based on the time of the first crest, how many complete vibrations would have taken place in 31 seconds had the sonic ranger continued recording?