[golfbulldog]

I think that the two are interchangeable in your example... no change in meaning... but lets not get into a physics debate...LOL

Using the words above, it is possible to draw a clear distinction between the words "essentials" and "imperatives".

e.g

It is essential in the building of a scaffold structure that suitable poles, planks, clamps and bolts are used in the process.

Furthermore, it is imperative that they are correctly used in order to protect the integrity of the assembled structure.

In G.O.L.F, be mindful of your essentials before bringing the imperatives into play.