Open the Pendulum Lab simulation and click on the Intro option. (https://phet. colorado. edu/sims/html/pendulum-lab/latest/p endulum-lab_en. html)

Investigation #1 (How does mass affect period?):

Change the string length to 0.5 m (upper right-hand corner)

Click and drag the pendulum so it has an amplitude of 10°

Change the mass each time you complete a trial

Use the stopwatch to time 10 full cycles of the pendulum

Calculate the period of the pendulum (time to complete one full cycle) by dividing the Time of 10 Cycles by 10.

*Abbreviations used below: Independent Variable - IV Dependent Variable - DV Constants - C

Data Table 1: IV - Mass (kg) DV - Period (sec) C - 10° Amplitude / 0.5 m String Length

Mass (kg)

Time of 10 Cycles (sec)

Period (seconds)

0.1

0.3

0.5

0.7

1.0

Investigation #2 (How does amplitude affect period?):

Keep the string length at 0.5 m

Change the mass of the pendulum to 1.0 kg

Change the amplitude each time you complete a trial.

Use the stopwatch to time 10 full cycles of the pendulum

Calculate the period of the pendulum (time to complete one full cycle) by dividing the Time of 10 Cycles by 10.

Data Table 2: IV - Amplitude DV - Period (sec) C - Mass (1.0 kg) / 0.5m String Length

Amplitude (°)

Time of 10 Cycles (sec)

Period (seconds)

10

15

20

25

30

Investigation #3 (How does string length affect period?):

Keep the mass at 1.0 kg

Click and drag the pendulum so it has an amplitude of 10°

Change the string length each time you complete a trial.

Use the stopwatch to time 10 full cycles of the pendulum

Calculate the period of the pendulum (time to complete one full cycle) by dividing the Time of 10 Cycles by 10

Data Table 3: IV - String Length DV - Period (sec) C - Mass (1.0 kg) / 10° Amplitude

String Length (m)

Time of 10 Cycles (sec)

Period (seconds)

0.10

0.30

0.50

0.70

1.0