BIO ENG C119 Study Guide - Free Body Diagram, Erector Spinae Muscles, Contact Force
Document Summary
Please write all answers in the space provided. If you need additional space, write on the back sides. Indicate your answer as clearly as possible for each question. Write your name at the top of each page as indicated. Use a free-body diagram to support your answer: (30 points total) dynamic analysis. A dumbbell is held in the hand during a curl exercise, and quickly raised toward the shoulder in a circular motion (angular acceleration a and angular velocity w) about the elbow joint. The wrist is fully rigid during this motion and the elbow does not move. At some instant before the forearm reaches the horizontal position, it is at an angle q to the vertical and is still accelerating. Treating this as a two-dimensional planar rigid body problem, do the following. (i) [10 points] draw a fully labeled free body diagram, including all accelerations, of the forearm/hand/dumbbell system.
