- #1

apphysics11

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## Homework Statement

A particle is in uniform circular motion about the origin of an xy coordinate system, moving clockwise with a period of 7.00 s. At one instant, its position vector (from the origin) is r = (6.00 m) i - (3.00 m) j. At that instant, what is its velocity in unit-vector notation?

## Homework Equations

V=2pir/T

## The Attempt at a Solution

I know to find the radius, you can use pythag which i got as 6.70m. but i don't know where to go from here. since if i just use the circular velocity equation i don't know how to put it back into unit-vector. also i haven't been taught angular motion which i have seen been used to solve it.

thanks.