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Investigating the factors which affect the time of a pendulums swing

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Monday, 7th February

Investigating the factors which affect the time of a pendulums swing


In this experiment, we hope to discover which various different factors take affect upon a pendulums oscillation, discover the appropriate formula to calculate the relative factor and how long the pendulum swings for.


Before we do our main experiment, we need to see which key factors affect the time it takes for a pendulums oscillation. We suspect either one of these three factors: Mss of pendulum, length of pendulum arm and angle of swing.


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Pendulum + 10


Pendulum + 20


Pendulum + 30


Pendulum + 40



Looking at the results, the range is from 11.19 – 11.37. Here is no great difference and is likely to be our mistake as the results don’t descend or ascend in any order at all.

Also mass doesn’t have anything to do with the formula, T=π√l/g.

My prediction is correct.

2) Testing to see whether the angle of the swing is a key point


I predict if we drop the pendulum fairly high, it will

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To start off, drop the pendulum at a small angleIncrease angle by intervals of 10 degrees.Record the results each time.


Angle (degrees)

Time (s)














There is a slight increase in time when the angle is bigger; however, there shouldn’t be a change. This may due to length of string being small. If you pull back twice as much, then the gravitational pull also doubles, therefore not affecting the resultant time.

3) Testing length to see if it affects time


I predict that if the length of the string is of a larger length, then it will swing slower

...read more.

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