PASCO ME-6807A Human Arm Model - Manual (Page 14)

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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 3 : T r i c e p s F o r c e v e r s u s P e r p e n d i c u l a r L o a d
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Procedure
1. Start data collection.
2. Hook the second force sensor onto to the model’s hand and pull in the direction
indicated in the illustration. Slowly increase the force while watching the graph.
3. When the load force reaches about 2 N, stop data collection.
Analysis
1. Using words and numbers, explain the relationship between load force and tri-
ceps force.
2. Were your predictions accurate? Explain.
Further Analysis
1. Draw a free-body diagram showing all forces (in the plane of rotation) acting
on the forearm.
2. What is the net force on the forearm?
3. What is the net torque?
Force Sensor 2
(Load Force)