(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

CD is playing for 74 min, starts at angular speed of 480 rpm then slows to 210rpm. whats the magnitude of the angular acceleration

2. Relevant equations

angular acceleration =ω/ t

3. The attempt at a solution

i converted the rev to rad then min to sec then divided by sec and got 50.3 rad/s and 14.7 rad/s ... 14.7-50.3=-35.6/4440s= -.0080 my book says its wrong....fyi this is my first pot in physics forum so i hope i did it all correct

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

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!

# Homework Help: Magnitude of angular acceleration- my first post ever in physics forum

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