Lecture 19 - Biomechanics and Orthopedics (cont.)

author: W. Mark Saltzman, Department of Biomedical Engineering, School of Engineering and Applied Science, Yale University
recorded by: Yale University
published: Jan. 4, 2011,   recorded: March 2008,   views: 2738
released under terms of: Creative Commons Attribution No Derivatives (CC-BY-ND)
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Description

Professor Saltzman begins the lecture with discussion of the importance of motion for the survival and propagation of any living species. He presents the different modes of motion, taking first the example flight to talk about force balance, such as the magnitude of propulsive force that must be generated overcome drag to produce forward motion. Next, the mechanics of walking, running, cycling and swimming is discussed, with emphasis on efficient use of energy, overcoming drag and friction, and the influence of organism shape and size. An equation to calculate drag force of a spherical object of radius, r, moving at velocity, v, in a medium with viscosity, μ, is introduced: Fd = 6πvμr. Finally, Professor Saltzman talks about design of the artificial hip, which biomedical engineers must take into consideration the biomechanics and natural function of the pelvic bone.

Reading assignment:

Biomedical Engineering: Bridging Medicine and Technology, in preparation by Mark Saltzman (forthcoming by Cambridge University Press); chapters 10 and 13

Resources:

Problem Set 9 [PDF]

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