Springs and Pendulums: Angular or Regular Frequency?

[axp107]

Well there the angular formula...

W = root (k/m) WACKEM for spring
W = root (g/l) WIGGLE for pendulums

do we use this formula or the regular frequency formula..?:

f = (1/2pi)*root(k/m)
f = 2pi * root (g/l)

I remember EK asking us to remember the wackem.. wiggle formula.. I used it and got the problem wrong b/c I didn't factor in the 2pi. I guess they introduce the angular formulas simply as a mnemonic then?

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[greg1184]

W = sqrt(g/l)
W = sqrt(k/m)

T = 2(pi)/W

Therefore:
T = 2(pi)sqrt(l/g)
T = 2(pi)sqrt(m/k)

Then:
f = 1/T


That is how you get frequency.