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[URL]http://imgur.com/2KIhk[/URL]

Hi!

If you please look at the image. I have already determined the equations of motion.

They are as follows:

Ma1 = 2kx1+kx2

Ma2 = -2kx2+kx1+kx3

Mx3 = -2x3 +kx2

Now... what I don't understand is how does this physically happen?

If you look at say mass m1. Then when the spring is oscillating it pulls the mass to the left

on the left side of m1 which is I suppose: -kx1 and the spring on the right is also doing that at x1 so then also -kx1 and then when it oscillates further at x2 the right spring goes +kx2 which gives us: ma1 = -2kx1+kx2.

I just wanna is this the correct analysis for determining the equations?

I'm just stomped and wish I knew a perfect 100% method on finding these equations.

I just "know" they're right... I just don't know why... sadly

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# Coupled Oscillation s

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