1. The problem statement, all variables and given/known data A turntable reaches an angular speed of 45.0 rpm, in 2.1 s, starting from rest. (a) Assuming the angular acceleration is constant, what is its magnitude? _2.24_rad/s2 (b) How many revolutions does the turntable make during this time interval? ______ rev 2. Relevant equations 3. The attempt at a solution I am having trouble with the second part. I figured out magnatude of the angular acceleration but I dont remember how to find the revolutions. Anyone help?