PASCO ME-6807A Human Arm Model - Manual (Page 18)

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H u m a n A r m M o d e l E x p e r i m e n t 5 : B i c e p s F o r c e v e r s u s S h o u l d e r A n g l e , C o n s t a n t E l b o w
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6. Set the sampling rate of the force sensor to 20 Hz.
7. Prepare a graph to plot biceps force versus shoulder angle.
Procedure
1. Start data collection.
2. Push the upper arm to rotate the shoulder from 0 degrees to about 85 degrees.
(Don’t touch the forearm or force sensor as you do this.)
3. Stop data collection.
Analysis
1. Is the graph linear?
2. As the arm lifts the mass (increasing the shoulder angle) does the biceps force
increase or decrease?