Pendulum Investigation
Introduction
In this investigation, I will try to attempt an experiment that will
measure the time taken for a pendulum to oscillate for one complete
swing; I will also explore and investigate the numerous variables that
might effect the time taken to oscillate.
Factors effecting periodic time
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The factors, which might affect the time taken for a pendulum to
complete one swing, are:
1. The length of string
2. Weight of bob
3. Angle of release
The variables which I will be excluding from this experiment are:
Gravity. This is a force pulling a mass down at a constant rate (at 10
Newton's, or to be precise 9.8 Newton's). Also no matter the size of
an object the gravity will still pull the bob down at a constant rate.
This will have little effect so I will chosen to exclude this.
Air resistance. This will oppose the speed of the bob because as the
bob is moving through the air, it will encounter some friction which
will oppose its movement, eventually slowing it down. But this cannot
be measured, so I will not exclude this variable.
Predictions
Length of string. I believe that this is the factor which will have
most affect on the time taken of the oscillation of the pendulum. I
believe that if you were to increase the length of the string, it will
take the pendulum longer to travel, as you are increasing the size of
the arc and thus increasing the distance needed to be travelled, hence
it will take more time. Therefore, if you are to decrease the length
of the string, it will take the pendulum a shorter amount of time to
travel, as you have decreased the size of the arc and thus shortening
the distance needed to travel. Also because the arc is longer there is
relatively more friction opposing the bob.
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[IMAGE][IMAGE]
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Mass of sphere.
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