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Unformatted text preview: ME 577 Human Motion Kinetics Homework #6 Due 28 March, 2011 1. Using the data supplied in the file, pitching_data.xls, calculate the forces exerted at the wrist, elbow and shoulder (dont worry about calculating the moments right now but you should include them in your free body diagram). The pitcher played for a Division I school and had a mass of approximately 78 kg and a height of 1.85 m. You will have to find the mass of the baseball. You are given the position data so you will have to numerically differentiate in order to determine the velocity and acceleration. Please include the following plots: 1a) Velocity of the center of mass for the humerus, forearm, and hand vs. time. 1b) Acceleration of the center of mass for the humerus, forearm, and hand. 1c) Magnitude of the distraction force at the shoulder vs. time. 1d) Magnitude of the total force at the shoulder, elbow, and wrist vs. time....
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