Hypothesis: I think that the factor that affects the time period of a simple pendulum is the length of the pendulum. To find the time is by using the formula:
Time is directly proportional to length of pendulum, so when time increases the length of the pendulum also increases. On the other hand, when g increases, time will decrease.
Dependent variables: time for one full swing/period.
Controlled variables: the attachment point of the string.
Materials & Diagrams:
Set the apparatus on the table.
Set the bob till 45 degrees mark (as precisely as possible) and then leave it.
As soon as it is left, start the stopwatch and record the time for ten oscillations.
Repeat the steps 2 and three two more times without changing the length in order to get three trials.
Now, increase the length of the string and repeat the steps 2, 3 and 4
Record 10 data points with three trials each.
In my experiment, the one factor that affected the motion of the simple pendulum was length of the string. As the length of the string was increased, the time period also increased. This is because the velocity decreased as the bob had to cover more distance in the given time. Hence, this proves my hypothesis correct.
The experiment would be better if we are using a protractor, so that our data will be more accurate and I need to improve in my time management so that I can submit my work on time.