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Part I Amplitude 6. Determine how the period depends on amplitude. Measure the period for five different amplitudes. Use a range of amplitudes, from just

Part I Amplitude

6. Determine how the period depends on amplitude. Measure the period for five different amplitudes. Use a range of amplitudes, from just barely enough to unblock the Photogate, to about 30. Each time, measure the amplitude using the protractor so that the mass with the string is released at a known angle. Repeat Step 5 for each different amplitude. Record the data in your data table.

Part II Length

7. Use the method you learned above to investigate the effect of changing pendulum length on the period. Use the 200-g mass and a consistent amplitude of 20 for each trial. Vary the pendulum length in steps of 10cm, from 1.0 m to 0.50 m. If you have room, continue to a longer length (up to 2 m). Repeat Step 5 for each length. Record the data in the second data table below. Measure the pendulum length from the rod to the middle of the mass.

Part III Mass

8. Use the three masses to determine if the period is affected by changing the mass. Measure the period of the pendulum constructed with each mass, taking care to keep the distance from the ring stand rod to the center of the mass the same each time, as well as keeping the amplitude the same. Repeat Step 5 for each mass, using an amplitude of about 20. Record the data in your data table

Data Table

Part I Amplitude

Amplitude

()

Average period

(s)

0 0
5 2.030
10 2.040
15 2.050
20 2.049
25 2.043

Part II Length

Length

(m)

Average period

(s)

0 0
0.5 1.431
0.6 1.565
0.7 1.690
0.8 1.808
0.9 1.919
1 2.039

Part III Mass

Mass

(g)

Average period

(s)

0 0
100 2.039
200 2.049
300 2.064

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