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drszdrsz
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Homework Statement
http://fatcat.ftj.agh.edu.pl/~i7zebrow/rysunek.jpg
tring constant is k,
object mass is [tex]M_{1}[/tex]
Damping friction is b
and we wiggle the top end of spring in the above diagram with amount Asin(wt)
(Where A is a amplitude and w is a frequency).
Homework Equations
Spring Force:
[tex]Fs=-kx[/tex]
Damping force is:
[tex]Fb=-b\frac{dx}{dt}[/tex]
The Attempt at a Solution
I don't need full solution.I just looking for differential equation for this problem.My attempt is:
[tex]M_{1}\frac{d^{2}x}{dt^{2}}+b\frac{dx}{dt}+kx=Asin(\omega t)[/tex]
I am sure about left side of the eguation but the right side is propably wrong I hope that someone can tell me where I made an mistake.
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