1. Experimental Design pendulum My Grandfather clock is running fast.
How do I adjust the timing?
pendulum

2. Variables in a Pendulum
SPEED OF SWING – PERIOD OF PENDULUM

3. Constants in a pendulum

4. SPEED OF SWING (SECONDS PER SWING)
MASS OF BOB OR WEIGHT
ANGLE OF RELEASE
LENGTH OF STRING OR WIRE
SPEED OF SWING (SECONDS PER SWING)
PERIOD

5. THE HYPOTHESIS CHANGE ONLY ONE INDEPENDENT VARIABLE,
WHICH SHALL IT BE? a, m or L
IF ___(independent variable)_____ IS __(describe change)___
IF THE IS INCREASED
THEN __(dependent variable)___ will __(describe change)__
THEN THE OF THE PENDULUM WILL INCREASE

6. THE EXPERIMENT Levels of the IV 2m 1.5m 1.0m 0.5m Number of Trials
IV: Length of String
Levels of the IV 2m
1.5m
1.0m
0.5m
Number of Trials
DV: Period of Pendulum
Constants: 1. 2. 4. 3.

7. Determine the Period for each of
SIMULATION
CLICK TO LAUNCH
Determine the Period for each of
the four Levels of the
Independent Variable

8. DATA TABLE Length (m) Period of Pendulum Trial 1 Trial 2 Trial 3
Trial 1
Trial 2
Trial 3
Trial 4
Average
Class Average
0.5
1.0
1.5
2.0

9. Graphing the Data (Insert the data and Label the graph)
Input the data into Logger Pro
– Length of String
– Class Average of Period

10. COMPLETED GRAPH

11. CONCLUSIONS 1. What was the purpose of the experiment?
2. What were the major findings?
3. Was the hypothesis supported by the data?
What possible explanations can you offer for the findings?
What recommendations do you have for further study
and for improving the experiment?