Hz vs rad/sec

[Bob-May]

EngineeringPaper.xyz treats any result with a dimension of 1/Time as Hz.

However rad/sec also has the dimension of 1/Time (specifically, 1/Sec)

The conversion between Hz and rad/sec is 2pi rad/cycle.

I cannot find any way to properly introduce this conversion.

See: https://engineeringpaper.xyz/iM5tvNfmbVbRgB2Y4uynGb

[Bob-May]

I see that you already know about this flaw. https://blog.engineeringpaper.xyz/calculating-the-natural-frequencies-of-a-cantilever-beam

Since EngineeringPaper.xyz will always interpret [1/sec] as being in Hertz, special care always needs to be taken with frequency calculations to explicitly force them to be in Hertz or to be in radians per second.

The point of using "units aware" calculation tools is to avoid the need to take "special care" with units - the tool is supposed to take care of this for you.

Sort of needs to be fixed, don't you think?

[mgreminger]

Thanks for the feedback. There's no way to automatically convert between radians/sec and Hz since radians would need to be interpreted as a unitless $2\pi$ rather than it's normal interpretation as an angular measurement. MathCad handles this situation in the same way. In addition to the approach you identified of dividing by $2\pi$, there are several options for making the conversion:

[mgreminger]

Closing since #217 prevents [1/s] from being automatically converted to [Hz], which addresses some of the issue raised here. In general, the conversion between [rad/sec] and [Hz] needs to be handled using one of the approaches outlined above.