Horizons: Exploring the Universe (MindTap Course List)
14th Edition
ISBN:9781305960961
Author:Michael A. Seeds, Dana Backman
Publisher:Michael A. Seeds, Dana Backman
Chapter4: The Origin Of Modern Astronomy
Section: Chapter Questions
Problem 11RQ: How did The Alfonsine Tables, The Prutenic Tables, and The Rudolphine Tables differ?
Related questions
Question
One person was doing a knee extensor muscle training, he used a dumbbell (mass = 10.2 kg) strapped to the ankle joint and was 0.4 m from the knee joint (see attached figure). The dumbbell was 0.3 m away from the knee joint in the horizontal direction.
if the lever arm for the knee extensor muscle force was 0.04 m about the knee joint center, what amount of force must the knee extensor muscle produce to hold the leg in the above position? (Ignore the weight of the leg)
Transcribed Image Text:a
b
COR
с
d
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