assignment+1 - posture and have a better sense about acting...

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BME 110A BIOMECHANICS FALL 2006 Homework Assignment #1 Due October 10, 2006 9:30 AM 1- Practice Problem. Using Free body diagram and equilibrium condition find reaction forces in supports A and B of the following beam: Assume that the weight of the beam is negligible. 2- Analysis Problem, Problem 1.17 page 34 of Fung book 3- Design Problem, You are to design a loading dock requiring workers to lift 20 lb boxes from the floor walk 2-3 steps and put them on a platform. Compare the bending moment acting on the spinal column at the level of a lumbar vertebra and main force generated by acting muscles to enable the worker to perform the lifting for the following two body postures: A) Knees straight and back bent B) Straight back and knees bent Hints: Try to lift something with similar weight with two different body
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Unformatted text preview: posture and have a better sense about acting muscles and forces on your back. Use your body dimensions whenever necessary if you are trying to perform any calculations Clarify any assumptions you made for the formulation of the problem Define clearly any length or dimension used in your equations You may want to use figure P1.22 C when the major muscle acting in lifting is the back muscle. There is no right or wrong answer to this problem, and your answer will be marked based on your ability to formulate a real life problem and describing your assumptions and justifications for the way that you formulated the problem. 100 N 200 N =60 3 3 3 A B...
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