Bernoulli’s Equation form Euler’s Equation 

It doesn't matter. You can also write curly(z)/curly(s) but since z depends only on s, partial and complete differentiation carries no difference.

Pls see the video of for sk som

It is only to get de results in meters! Doing this you get N.m/N = m, got it? Energy/Force

@@Fillipe_Mendes you are right. In aerodynamics we use to neglect body forces, so there is no g terms in our analysis, but it can appear in our calculations when we want to refer it to a global coordinates!!!

Super sir