(adsbygoogle = window.adsbygoogle || []).push({}); Coefficient of Friction and Spring constant

What would the approximate value of (kinetic, and if possible, static) friction be for a block of wood of this nature:

\\Attachment 1 and 2

And how about the 'k' value for these springs? How would i go about calculating this sort of problem when the two springs are attached to a board which is the place of impact? Would i double the value of k?

\\Attachment 3

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# Homework Help: Approximate K and 'u' values| HELP

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