You are lifting a barbell as shown with the following characteristics: 20 0.215 m 0.432 m...

 

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You are lifting a barbell as shown with the following characteristics: 20 0.215 m 0.432 m Mass of forearm: 1.123 kg Mass of barbell: 22 kg Arm moment of inertia: 0.058 kg*m Distance from barbell to elbow: 0.432 m Distance from arm CoM to elbow: 0.215 m Horizontal arm acceleration: 0.378 m/s Vertical arm acceleration: 0.137 m/s Angular arm acceleration: 1.87 rad/s Arm is at an angle 20 below horizontal Complete the following tasks: 1) Draw a free body diagram (2 pts) 2) Calculate the joint reaction forces at the elbow in the X and Y directions (4 pts) 3) Provide your interpretation of the joint reaction forces (2 pts) 4) Calculate the muscle moment about the elbow (4 pts) 5) Provide your interpretation of the muscle moment (1 pt) You are lifting a barbell as shown with the following characteristics: 20 0.215 m 0.432 m Mass of forearm: 1.123 kg Mass of barbell: 22 kg Arm moment of inertia: 0.058 kg*m Distance from barbell to elbow: 0.432 m Distance from arm CoM to elbow: 0.215 m Horizontal arm acceleration: 0.378 m/s Vertical arm acceleration: 0.137 m/s Angular arm acceleration: 1.87 rad/s Arm is at an angle 20 below horizontal Complete the following tasks: 1) Draw a free body diagram (2 pts) 2) Calculate the joint reaction forces at the elbow in the X and Y directions (4 pts) 3) Provide your interpretation of the joint reaction forces (2 pts) 4) Calculate the muscle moment about the elbow (4 pts) 5) Provide your interpretation of the muscle moment (1 pt)