# Angular Velocity of LP record

1. Oct 29, 2011

### valeriex0x

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

The once-popular LP (long-play) records were 12 inches in diameter and turned at a constant 33(1/3) rpm.
Find the angular speed of the LP in rad/s and its period in seconds.

2. Relevant equations

1 rpm=((2∏)/60)

3. The attempt at a solution

for ω i got 3.49

I need help with finding its period in seconds, T.

2. Oct 29, 2011

### Nytik

$ω=2π/T$

One of the basic equations of circular motion, well worth knowing!

3. Oct 29, 2011

### valeriex0x

thank you. could you please let me know if my omega is correct. I just want to make sure. for T i got 1.80

4. Oct 29, 2011

### Nytik

Unless we both made some horrible mistake!

5. Oct 29, 2011

### valeriex0x

yayy! thanks! on to the next...