Lecture10 - F centripetal Small R -> Higher speed F...

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Unformatted text preview: F centripetal Small R -> Higher speed F centripetal F centrifugal Strong pull required Weak pull required F centrifugal F centripetal = m a centripetal = m v 2 / R Centripetal –Centrifugal: Action –reaction pair Big R -> Lower speed F centrifugal = -F centripetal 3 rd law The Conical Pendulum Force diagram θ x y T mg L T mg R Non uniform Circular motion Occurs when the velocity particle moving on along a circular path changes both its magnitude and direction •v not constant: dv dt = 0 •v constant: dv dt = 0 There is only a radial acceleration because v changes direction a radial = mv 2 / R a radial = mv 2 / R a tangential = dv dt a tot = a tan + a radial a radial a tan V a radial Constant v V Non constant v F net Example Let’s revisit the problem of last time. A pilot of mass m in a jet aircraft executes a loop as shown in the figure. In this Case the pilot is not moving with a constant velocity. What is his acceleration? bottom top Force diagram mg N bot mg N top bottom top Force diagram mg N Lside mg Left side Right side N Rside F net Right side Left side F...
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This note was uploaded on 04/03/2008 for the course PHYSICS 7A taught by Professor Lanzara during the Spring '08 term at Berkeley.

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Lecture10 - F centripetal Small R -> Higher speed F...

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