Finding the position on a circle.

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AI Thread Summary
The discussion revolves around determining the position of a runner moving in a circular path at a constant speed of (3i + 3j) m/s on a circle with a radius of 10 m. Participants emphasize the need to clarify the distinction between speed and position, noting that the original response mistakenly provided speed instead of position. The importance of understanding vector components represented by i and j is highlighted, as well as the suggestion to visualize the problem with a diagram. Ultimately, the conversation underscores the necessity of accurately interpreting the question to find the correct position on the circle.
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Homework Statement



Someone runs on a circle in the direction of a clock. He goes at constant speed. The circle is put in a xy plane that is centered at the origin. The radius is 10 m. At a certain moment he has a speed of (3i + 3j) m/s. Determine the position at this moment. (in vectorial notation)

Homework Equations


a^2+b^2=c^2

The Attempt at a Solution



3^2 + 3^2 = 18
4.24
Square root ( 18) = 4.24 m/sLast question for tonight, I promise.[/B]
 
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The question asks for a position and you have specified a speed as your answer.
 
phinds said:
The question asks for a position and you have specified a speed as your answer.
Yeah, but we need to find the length of the vector of the speed to be able to find the position, no ?
 
What do i and j represent?
 
phinds said:
What do i and j represent?
Oh, IM really sorry. i and j are vectorial units.
 
astrololo said:
Oh, IM really sorry. i and j are vectorial units.
units of what? What I'm trying to get here is for you to specify more clearly just what it is that you know. You really should draw a picture.
 
It's m/s
 
astrololo said:
It's m/s
We're really getting nowwhere here. Draw a picture showing what you know and what you are tying to find out.
 

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