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Playground Physics In playground design (swings), what would be the perfect swing height for an optimum swing time?. The Experiment Design Writing the Design Plan. Your task: - PowerPoint PPT Presentation
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Playground Physics
In playground design (swings), what would be the perfect
swing height for an optimum swing time?
The Experiment DesignWriting the Design Plan
Your task:
To investigate the swing of a pendulum as a model for the project. Decide on your variables in this lab and what factors will change the swing rate.
Write a report and present your research and findings explaining the steps you took, the findings and your final recommendations.
Bob/ weight
Length of String
angle
Time period
period is the time for the bob to return to the point of release
2.8 s
PLANNING AND DESIGN
Fun in the
Creativity, Teamwork, Collaboration
Fun in the Fun in the
Creativity, Teamwork, Collaboration
Client Specifications: 1. Recommendation requires thorough study of all 3
variables to determine ultimate swing height for a prefect swing time.
2. For each variable (mass, angle, length), 5 variations are needed. e.g. 5 masses, 5 lengths, 5 angles.
3. A minimum of 3 trials is set for each variable. Each trial reflects the average time period for 10 full swings (T/10).
Schedule and Tasks: 1. First half: [ ] Complete hypothesis for the 3 variables [ ] Write outline of procedure [ ] Draw blank data tables for recording results
2. Second half [ ] Set-up pendulum [ ] Finalize procedure; includes diagram of apparatus
Task: Investigate the effect of mass, angle, length on the time period of a pendulum.
Writing the Aim:
Change into a question: How does (independent variable/s)__________________
affect the (dependent variable) __________________ ?
Writing the HypothesesWhich variable has an effect on the rate of
swing? Which does not? Why?
Changing and Controlling Variables:
Changing Variables:
Rate of swing: 10 swings
2. For each variable (mass, angle, length), 5 variations are needed. e.g. 5 masses, 5 lengths, 5 angles.
3. A minimum of 3 trials is set for each variable. Each trial reflects the average time period for 10 full swings (T/10).
Organizing DataCreating the Data Table
Table showing effect of Distance on Force
Distance D/m
Force of Car F/NWork
W= F x DTrial 1 Trial 2 Trial 3 Average
0.5 (A)
0.6
0.7
0.8
0.9
1.0 (B)
Appropriate title: includes I and D variables
Independent variable with
correct symbol and
units
Dependent variable with
correct symbol and
units
Reflect 3 trials and average
This section introduces the topic of the project, notes any information already available, explains why you are interested in the project, and states the purpose of the project.
Background
•Why was this study performed?
•What knowledge already exists about this subject?
•What is the specific purpose of the study?