QUESTION 3 (30 points) You are holding a book in your hand and suspending a bag from your forearm (see figure). Informat

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Question 3 30 Points You Are Holding A Book In Your Hand And Suspending A Bag From Your Forearm See Figure Informat 1 (376.27 KiB) Viewed 45 times

QUESTION 3 (30 points) You are holding a book in your hand and suspending a bag from your forearm (see figure). Information about this situation is given in the table. A. Draw a free body diagram of the forearm and hand segment (5 points). B. Calculate the muscle torque about the elbow joint required to hold the forearm and hand segment in this position. Please keep your answer in Newtons and centimeters (10 points). C. What is the anatomical direction of this muscle torque? (2 points) D. What magnitude of muscle force must be produced to maintain this position? (6 points) E. Fill in the blank: In the provided diagram, movement of the forearm and hand segment in this plane takes place around the anatomical axis of the elbow joint (2 points). F. Short answer: In your calculations, you should have found that despite the heavier bag (70 N), the torque produced by the bag about the elbow was smaller than the torque produced by the book (50 N). How is it possible for the lighter book to produce a larger torque? (5 points) Force Moment arm 40 cm Book 50 N Bag 70 N 5 cm Forearm + hand 15 N 20 cm 5 cm Muscle moment arm for the elbow flexors Muscle moment arm for the elbow 3 cm ZO extensors