PURPOSE:

HYPOTHESIS:

MATERIALS:                                           SKETCH:
Ring stand
String
Paper clip
Washer
Stopwatch

PROCEDURE:
1. Set up pendulum using greatest string length.
2. Record string length in data chart.
3. Hold pendulum at 90 degrees and release.
4. Start stopwatch at time of release.
5. Stop stopwatch at end of 10 periods.
6. Record time for 10 periods.
7. Repeat steps 3-6 two more times.
8. Calculate average time for 10 periods.
9. Calculate time of one period. Divide the average time for 10 periods by 10.
*Calculate to 1/100 – 2 places to the right of the decimal
10. Set up pendulum using another string length.
11. Repeat steps 2-8 for remaining string lengths.
12. Graph Time (on X-axis) VS. String length (Y-axis)
                *Use data from “1 Period” column
13. Calculate percent change (% change) to determine amount of differences in your data between trials
                *% Change = Highest Time – Lowest Time        X     100
                                                   Average Time
 

Data Chart:

StringLength	Time for 10 Periods			Av. Time for 10  Periods	Time for 1 Period	Average Time for 1 Period
cm	Trial 1	Trial 2	Trial 3
30	__________	__________	__________	__________	____________	______________
50	__________	__________	__________	__________	____________
70	__________	__________	__________	__________	____________
90	__________	__________	__________	__________	____________

IV:___________________

DV:__________________

Constant(s):_________________________________________________________

CONCLUSION:

THESIS STATEMENT:

DATA INTERPRETATION:
1. DID the string length affect the period? (direct or indirect relationship)
2. How do you know?
a. Graph
b. Table
3. Was the % change significant or important in this lab?
4. Were the differences in the data due to human error or changes in the pendulum?
5. How do you know?
*% Change

ERRORS:
What are some possible sources of errors for this lab?

CONCLUSION STATEMENT: