i have a basic question about the natural frequency of a system.(adsbygoogle = window.adsbygoogle || []).push({});

for a mass (M), spring (k constant) undamped system the natural frequerncy is:

w_n=sqrt(k/M)

the units of w_n according to a lot of resources i found on the internet & textbooks are [rad/sec], my question is why?

if i use the k constant units divided by the mass i get [Hz]:

[k]/[M]=[N/m]/[kg]=[kg*m/s^2*m]/[kg]=[1/s^2]

[w_n]=sqrt([k]/[M])=[Hz]

i'll appreciate a clarification in this subject.

thanks.

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# Natural Frequency Question SI Units

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