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### skyrocketing vs upward trajectory

Posted: Thu Jan 23, 2014 9:11 am
Hello,
I would like to know the real difference between 'upward trajectory' and 'skyrocketing' terms. Skyrocketing behavior looks like a curved path with an exponential growth as illustrated below;
http://houstonagentmagazine.com/wp-cont ... estate.jpg

and dictionary defines 'trajectory' as :
"the high curving line in which an object such as a missile moves through the air" - MacMillan Dictionary
"the curved path that an object follows after it has been thrown or fired into the air" - Oxford and Cambridge Advanced Learner's Dictionary

http://www.air-and-space.com/20060614%2 ... ch%20l.jpg

Accordingly, it seems 'upward trajectory' does not have an exponential pattern (growth rate increasing every one step at a time) and therefore the curved path reaches an apex and then follows a downward trajectory.

Please distinguish these terms: 'skyrocketing', 'upward trajectory', and 'downward trajectory'.
Sorry If i made wrong assumptions; you may correct me.
Best,

### Re: skyrocketing vs upward trajectory

Posted: Tue Jan 28, 2014 4:38 pm
"trajectory" is a noun, and refers to the *path* or something such as a missile. The path may be upward or downward or no doubt otherwise.

You could conceivably have a "skyrocketing trajectory" but it makes no sense to compare "trajectory" and "skyrocketing" - they are not the same parts of speech.

### Re: skyrocketing vs upward trajectory

Posted: Wed Jan 29, 2014 3:28 pm
To be more specific, does a trajectory path necessarily have a 'turning point' at which the path slope changes from upward to downward direction like a ballistic missile? If so, do you think that 'upward trajectory' in the following example should be replaced with 'skyrocketing direction'; because nobody wants to make a decision for improving his/her life/career in a way that at some point in time (the turning point) requires following a downward trajectory after experiencing a successful upward trajectory. Instead the audience would like to take a decision to turn his life/career path into a skyrocketing direction - a non-stop progress.

"You can put your life and career into an upward trajectory by making the decision, today."
- The example above taken from an English native author in the subject of self-help, motivation, and personal development.

### Re: skyrocketing vs upward trajectory

Posted: Sat Feb 08, 2014 8:40 am
DavidDe wrote:To be more specific, does a trajectory path necessarily...
No need to say "trajectory path" since a trajectory IS a path.

### Re: skyrocketing vs upward trajectory

Posted: Sat Feb 08, 2014 8:42 am
I follow your reasoning but given that the author has written "upward trajectory" (not just "trajectory") it seems like splitting hairs.

### Re: skyrocketing vs upward trajectory

Posted: Sun Feb 09, 2014 6:15 pm
Actually, life path is kind of trajectory. In fact, one borns as a little baby, then they grow up to become an adult following upward trajectory; in their forteens, especially men, they have everything in life; eventually they get old, following downward trajectory. What I mean the author is telling the truth; that's of his honest. However, as a first-class motivational speaker and author he should know the purpose is motivating the audience and thus words have to be chosen carefully.