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Q & A: x and y knowing velocity?

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Most recent answer: 11/15/2011
Q:
How do I find x and y when given only velocity?
- Veronica (age 17)
A:
Well you can't. 
There are two things missing, v and t.  The quantities x and y are positions along two mutually orthogonal directions.  The velocity, v, is directional.  In two dimensions you need to know its angle θ in the x-y plane as well as the elapsed time, t.  In that case x =vt cos(θ) and y = vt sin(θ) . In three dimensions its a bit more complicated.

LeeH

(published on 11/15/2011)

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