PHYS171_f11_lecture_16

PHYS171_f11_lecture_16 - PHYS171 alaporta@umd.edu Rm 1111,...

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PHYS171 alaporta@umd.edu Rm 1111, IPST building (building #085) Chapter 5 What happens when an object is at terminal velocity and the external force is removed? ext F r d F r v r d F r v r
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We can analyze this problem by simply shifting to a different inertial reference frame in which the particle is at rest 12 0% 0% 1. True 2. False We can’t say the laws of physics look identical in a moving frame because the drag force depends on the relative speed with respect to the fluid. If we shift to a reference frame in which the fluid is not at rest, the drag force depends in ( v - v frame ), not just v . Biological Force Generators Kinesin: motor protein which “walks” on microtubules
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Cell body axon ~ 1 meter ~10 μ m Neuron Basic job for motor proteins: Moving things around Show movie here http://www.studiodaily.com/main/searchlist/6850.html
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Basic job for motor proteins: Moving things around Basic job for motor proteins: Moving things around
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Basic job for motor proteins: Moving things around J. Shaevitz, Steven Block lab at Stanford University
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This note was uploaded on 12/29/2011 for the course PHYSICS 171 taught by Professor La porta during the Fall '11 term at Maryland.

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PHYS171_f11_lecture_16 - PHYS171 alaporta@umd.edu Rm 1111,...

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