The text for the intro physics class I'm taking is the first edition. I have noticed some errors in earlier chapters, and was wondering if this problem here is also an error? Not sure yet.(adsbygoogle = window.adsbygoogle || []).push({});

The question is about a CD. It says to find the angular velocity, and gives two points on the radius. r_1 and r_2. The question is an example, and the problem is solved for you. The given tangential velocity is 1.216 m/s. Then, they divide v_t by each radius, and determine two different angular velocities.

Is this correct? My understanding is only the tangential velocity can change depending upon position on the radius. Does this mean the angular velocity also depends on the radius?

ω_1 is 48 rad/s

ω_2 is 20 rad/s

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Angular velocity error in textbook?

**Physics Forums | Science Articles, Homework Help, Discussion**