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videoFreeAnalyser .pdf


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Free Fall Laboratory Experiment
with your smartphone
Purpose: Studying a free fall with your smartphone
Requirements: First of all you need your smartphone. In order to perfrom
this experiment you have to download the free applicationVidAnalysis free
Introduction:
Are you tired of having
poor measuring instruments in
physics lessons? Then this is
the right thing for you!
VidAnalysis Free is a
multipurpose tool: In this app
measurement, physics and the
actual math behind it are
combined. For example you
can film the free fall of a small
ball or a pendulum experiment
with the camera of your
smartphone or tablet. Next
you analyze the video by marking the object you want the motion to be tracked in
every frame of the video. With this information the app creates a time-x-distance-,
time-y-distance-, x-distance-y-distance-diagram and adds all values to a list. You can
also save the values as a CSV file and study the experiment with LibreOffice and your
computer. With the free software LibreOffice you can add your own function to the
measured values into the diagrams.
Summarized: With this app you can
- organize your videos for analysis
- choose measuring points for analysis
- set an absolute length as reference to reality
- set an coordinate system and even rotate it
- correct your chosen points in analysis
- display three diagrams, where you can add an function as a model
- display the list of all measured values
- share and save this list as CSV file
Doing the Experiment
The falling object is an ordinary ball. With VidAnalysis Free, you have to make a
movie of the free fall and to find out the maximum value of the vertical speed.
The lab report
You have to write the protocol of the experiment and the result of your measurement.
At the end of the lab, don’t forget a conclusion. This lab report will be on your website.


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