9_Oscillations_fall2010_2

9_Oscillations_fall2010_2 - Dr. Bernd Stelzer Mechanics and...

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Unformatted text preview: Dr. Bernd Stelzer Mechanics and Modern Physics PHYS 120 SFU Fall 2010 Dr. Bernd Stelzer Recap: Simple Harmonic Motion (SHM) 11/24/10 Sinusoidal oscillations are the most fundamental and are called simple harmonic oscillations x ( t ) = A cos 2 t T PHYS120 12 x(t) = A cos( t) v x (t) = A sin( t) a x (t) = 2 A cos( t) We define an angular frequency (in rad/s) = 2 f = 2 T (in Hz) Question 11/24/10 A. Velocity is zero; force is to the left. B. Velocity is negative; force is to the left. C. Velocity is negative; force is to the right. D. Velocity is positive; force is to the right. E. Velocity is zero; force is to the right. This is the position graph of a mass on a spring. What can you say about the velocity and the force at the instant indicated by the dotted line ? PHYS120 13 x(t) = A cos( t) v x (t) = A sin( t) a x (t) = 2 A cos( t) Example 11/24/10 Consider a mass and spring oscillator whose position is given by: (a) What is the maximum speed of the object?...
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This note was uploaded on 03/30/2011 for the course PHYS 120 taught by Professor G during the Fall '11 term at Simon Fraser.

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9_Oscillations_fall2010_2 - Dr. Bernd Stelzer Mechanics and...

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