
#1
Oct2611, 02:21 PM

P: 1,227

1. The problem statement, all variables and given/known data
The displacement of a mass oscillating on a spring is given by x(t) = xmcos(ωt + ). If the initial displacement is zero and the initial velocity is in the negative x direction, then the phase constant is: 2. Relevant equations 3. The attempt at a solution How do I start? The book just tells me that the phase constant depends on displacement and velocity when t = 0, but doesn't say how. 



#2
Oct2611, 03:28 PM

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P: 11,441

Sketch a cosine curve. What's its initial value? Where on the curve would match the initial condition of the spring and mass? What's (angular) the offset from zero?




#4
Oct2611, 04:57 PM

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P: 11,441

phase constant of SHM
Does the mass start at a maximum extension like the cosine function does?




#5
Oct2611, 05:04 PM

P: 1,227

No, initial displacement is 0. So, I need to find where cosx equals 0?




#6
Oct2611, 05:13 PM

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P: 11,441





#8
Nov911, 07:17 PM

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P: 11,441

Have a gander:



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