it's been 30 years since college and I was just browsing the net when I found that familiar problem. I seem to recall something about 2 pi related to rads somehow. I'm not really pressed for the solution, was just wondering. Glad I found this forum though, looking around a bit.
Homework Statement
A record player rotates normally at a rate of 18 rev/m.
It takes 70 seconds for it to slow down to a stop when you turn it off.
Homework Equations
Calculate the magnitude of its angular acceleration.
The Attempt at a Solution
answer key says the correct answer should be...