PURPOSE:

HYPOTHESIS:

MATERIALS:                                     SKETCH:
Ring stand
String
Paper clip
Washer
Stopwatch
Protractor

PROCEDURE:
1. Hold pendulum at 90 degrees and release.
2. Start stopwatch at time of release.
3. Stop stopwatch at end of 10 periods.
4. Record time for 10 periods.
5. Repeat steps 3-6 two more times.
6. Calculate average time for 10 periods.
7. 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
8. Hold pendulum at 70 degrees and release.
9. Repeat steps 2-7.
10. Hold pendulum at 50 degrees and release.
11. Repeat steps 2-7.
12. Hold pendulum at 30 degrees and release.
13. Repeat steps 2-7.
14. Graph “Time in seconds” (on X-axis) VS “Arc in degrees” (Y-axis)
        *Use data from “1 Period” column
15. Calculate percent change (% change) to determine amount of differences in your data between trials
           *% Change = Highest Time – Lowest Time      X     100
                                               Average Time

DATA AND OBSERVATIONS:
 

Arc	Time for 10 Periods			Av. Time for 10  Periods	Time for 1 Period	Average Time for 1 Period
degrees	Trial 1	Trial 2	Trial 3
90	_________	_________	_________	_________	____________	______________
70	_________	_________	_________	_________	____________
50	_________	_________	_________	_________	____________
30	_________	_________	_________	_________	____________

IV:___________________

DV:__________________

Constant(s)__________________________________________________________

CONCLUSION:
THESIS STATEMENT:

DATA INTERPRETATION:
1. Did the arc angle 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: