What is the Angular Velocity of a Point Moving in a Circular Path?

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Homework Help Overview

The discussion revolves around determining the angular velocity of a point moving in a circular path, with specific values provided for radial velocity and radius. Participants are examining the relationship between linear and angular velocity in this context.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are attempting to relate linear velocity to angular velocity using the provided equation. There are questions about the correctness of the initial calculations and the interpretation of angular velocity units.

Discussion Status

The discussion is ongoing, with some participants providing insights about potential mistakes in the calculations and the importance of checking units. There is no explicit consensus on the correct answer, but guidance has been offered regarding the interpretation of angular velocity.

Contextual Notes

Participants are working with specific values for radial velocity and radius, and there is mention of different units for angular velocity, which may be contributing to confusion. The original poster expresses uncertainty about their calculations.

Sheen91
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Homework Statement



[PLAIN]http://img707.imageshack.us/img707/2066/question3.jpg

Homework Equations



v = r' \hat{r} + r*θ' (^θ)

The Attempt at a Solution



I was sure I knew how to do this question but made a mistake somewhere, because my answer is not right. So here is my working out.

l r' l = 11mm/s
Θ' = ?
r = 78mm

Looking at the question above.

[PLAIN]http://img20.imageshack.us/img20/8729/lolbo.jpg
 
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The angular velocity is usually given in radian/s. Check the answer in your book. Otherwise your result looks OK.

ehild
 


There are two answer rads/s and degs/s, both are not the same as my answer.

I definitely did something wrong.
 


The sign can be wrong. The velocity shown makes the angle θ smaller.

ehild
 

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