Frequency and Period #2

Practice Problems
Frequency and Period #2

Directions: On this worksheet you will examine properties of a simple pendulum, a vibration graph, and a graph of Period² vs Length.

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Question 1 During an experiment, data is collected on the vibrations of a simple pendulum. A graph of Period² vs Length is plotted and forms a linear graph with a slope of 4.12 and a y-axis intercept of 0.15. Use the fact that the numerical value of the slope represents 4π²/g to determine the value of gravity in the lab room.

3.05 m/sec²38.33 m/sec²9.58 m/sec²9.30 m/sec²

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Question 2 If the accepted value for gravity at sea level is 9.8 m/sec², what was the percent error for this group's experiment?

2.223%31.308%2.274%7.028%

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Question 3 According to the data summarized by the group's regression line in Question #1, determine the frequency of a pendulum that was 87 cm long?

0.517 hz0.0528 hz0.268 hz0.0789 hz

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Question 4 How would the period of a 38 cm pendulum compare to the period of the pendulum in Question #3?

It would be greater.It would be smaller.It would be the same.

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Question 5 What is meant by the term pendulum bob?

It represents the pivot point from which a pendulum vibrates.none of the four other statements listed is a correct answer.It represents a synonym for a pendulum's frequency.It represents the angle from which a pendulum is released.The mass attached to the end of a simple pendulum.

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Question 6 What would be the correct units to measure the slope of the regression line described in Question #1?

L/T²sec²/mm/sec²T²/L

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Question 7 What is the frequency of a pendulum whose vibration graph is shown below if its 1st crest occured at t = 6.65 sec and its last crest occured at 53.65 seconds .

0.191 hz5.222 x 10⁰ hz5.875 x 10⁰ hz0.170 hz0.168 hz

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Question 8 Using the equation T = 2p SQRT(L/g) what would be the length of the pendulum in Question #7?

2.93 meter6.77 meter8.57 meters5.88 meter