# Homework Help: Angular Velocity HELP

1. Nov 12, 2007

### Sucks@Physics

James move sin a circular path (radius 15.0m) with a speed of 60 m/s. His angular acceleration in rpm is?

DO you ahve to convert to rad/s then to rev/s then rev/m?

Any help would be appreciated

2. Nov 12, 2007

### Shooting Star

Do you know the relationship between angular speed and angular acceleration? Study the problem carefully.

3. Nov 12, 2007

### Sucks@Physics

youw ould have to fine the arc length correct? 15x2(pi) = 94.24777. but I keep thinking i would have to have time before i can solve this problem

4. Nov 12, 2007

### Shooting Star

If James is going at a constant linear speed, the angular speed is also constant. Does that mean anything?

5. Nov 12, 2007

### Sucks@Physics

so divide that by 60 seconds which would give me 1.5707 rad/s. Is this correct so far?

6. Nov 12, 2007

### Shooting Star

I am just wondering, have you been asked to find angular speed or acceleration?

7. Nov 12, 2007

### Sucks@Physics

Angular velocity

8. Nov 12, 2007

### Shooting Star

Then why did you ask for acceleration????

Well, w=v/r. Convert as you said in your first post. 1 rev/s = 2*pi rad/s.

9. Nov 12, 2007

### Sucks@Physics

Sorry about that! but thanks a lot, very much appreciated!