Chose a Question- Which of the questions would you like to investigate and the find the answer?
How does a length of a string on pendulum affects the frequency of pendulum?
1.Why did you choose that question?
I chose this question because I suspect that the length of a pendulum string could make a difference in the duration of the pendulum swing and hence the frequency of the pendulum.
2. Why it is important or interesting?
I would like to find out which variable might affect the pendulum frequency. If I know that is not the weight of a washer then I would like to try to investigate if it is the length of the string on the pendulum.
3. Refine the question into one that is testable by investigation. ( how not why)
It looks like that my original question was already refined.
In order to conduct investigation posed by our question, we used two different lengths of the pendulum and measured the number of complete swings the pendulum would make in 10 seconds. One string was approximately 8 inches long and the other one was 3 inches long. The investigation showed that the longer pendulum had 9 swings in 10 seconds in all three trials and that the short string pendulum had 12 swings.
So, this is the evidence that the length of the string on the pendulum does affect the frequency of the pendulum. The longer the pendulum, it will have lower frequency and the length of the swing.
The shorter the pendulum its frequency will increase.
I searched other evidence that relates to my question on the internet. I found the information on the internet that supports our claims.
http://sciencenetlinks.com/lessons/exploring-pendulums/
Answer to the quiz question in the class:
The experience of your daughter on that type of swing might be different as the two strings that the pencil is attached to are of different length.
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