Thanks again, a couple more runs through those equations and (hopefully) all will be clear.

I didn’t introduce differentials. Previously I had thought “a = dv” which seemed quite simple. Then I found:

Quote:
Acceleration is the time rate of change of velocity, not just change in velocity. This means that a does not equal dv. It means that a = dv/dt.


This seemed to say my simplistic equation was wrong. While I was prepared to accept that; I found myself thinking: “v = l/t so this new equation has t^-1 twice on the RH side; what effect does that have?”


There never was nothing.