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.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Natural Frequency Question SI Units

**Physics Forums | Science Articles, Homework Help, Discussion**