Can anyone please tell me the coefficient of friction from the tetra to the carpet (both mu_S and mu_k please)? Your help is greatly appreciated. :yikes: 
you could determin this experimentally:
get a force meter (mechanical bathroom scales will work too…)
measure force at the moment it starts to move…
Fmax=mu_s*N
so:
mu_s=Fmax/N
and once it’s moving:
mu_k=Fmax/N
theorecticly you should get two different values, but i don’t think you could notice the difference…
-Leav