Which system of units is coherent for mechanics?

[core1985]

Homework Statement

FPS, CGS, SI, MKS, All of these

Relevant Equations

As coherent system of units has only 1 as base unit and all derived quantities are formed also are coherent

So, should i write All of these as accodring to wiki pedia maxwell applied coherence concept to FPS, CGS, and SI is already coherent so answer will be All of these ?? Am i right or MKS because question is restricted to mechanics only ?

 

[fresh_42]

Homework Statement:: FPS, CGS, SI, MKS, All of these
Relevant Equations:: As coherent system of units has only 1 as base unit and all derived quantities are formed also are coherent

So, should i write All of these as accodring to wiki pedia maxwell applied coherence concept to FPS, CGS, and SI is already coherent so answer will be All of these ?? Am i right or MKS because question is restricted to mechanics only ?

Units serve a purpose. Their use is usually determined by the environment they are used in. If you live in Europe, then SI units are the normal. Except you work in the airline business, where feet and miles and pounds are used. If you live in the US, then things become a bit complicated, as it depends on the industry. The famous Mars lander fail 1999 was due to the fact that Lockheed and NASA used different systems and didn't communicate it.

This is another reason units should always by dragged through the entire calculation. Then it doesn't matter which ones are used, because they are part of the figures.