Hi all, i think the word deceleration is used incorrectly and can cause problems for students learning physics For example, if i start from rest and run as fast as i can until i eventually more at a constant speed. Then my interperetation of this is that (i) i accelerate at some rate (ii) continually reduce my acceleration until, (iii) I move with an approximate constant speed. The word decelerate implies a relatively smaller magnitude acceleration ( as in (ii) above. Often, deceleration is used to describe a reverse acceleration without any consideration of its magnitude as in example 2. If I start from rest, run as fast as possible to top speed and stop as quick as possible. For this situation my so called deceleration has a higher magnituded than the forward acceleration. Am I on the right track or do I simply misunderstand the English language?