# Angular Velocity

1. Aug 30, 2010

### vickyiit

1. The problem statement, all variables and given/known data

radii R₁, R₂, angular velocity ω₁, ω₂
2. Relevant equations

Two particles 1 and 2 describe co-planar concentric circles of radii R₁ and R₂ with angular velocities ω₁ and ω₂ as shown in the figure. Find the angular velocity of A with respect to B.

3. The attempt at a solution

Θ will be constant as particles are moving with constant velocity. therefore, ω₁₂=(|V perpendicular|)/(vector R). But i am not sure whether i proceeded right. Please help.

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2. Aug 30, 2010

### mezarashi

You've got to a good start by correctly understanding that both particles are moving at constant "velocity". What you don't mention is... what velocity? The same linear or angular velocity?

;-)

3. Aug 31, 2010

### vickyiit

angular velocity

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