Can someone walk me through this problem? A power drill reaches 13164 rpm in 1.01 seconds. What is the angular acceleration? The answer listed is 3.791 rad/s2, but I don't know how to get there. So far, I did (13164 rev x 2pi)/60 seconds to get 1378.5 rad/s (which is 'w', right)? but change in 'w' from 0-1378.5 / change in 't' from 0-1.01s isn't right. Please help.