Angular acceleration and speed

[Knfoster]

Homework Statement

A mass attached to a 43.9 cm long string starts from rest and is rotated 35 times in 57.0 s before reaching a final angular speed. Determine the angular acceleration of the mass, assuming that it is constant and determine the angular speed after 57 sec.

Homework Equations

V=rW
W=2pi*f
f=1/T
T=time it takes for one revolution
3. The Attempt at a Solution
T=35/57 sec gives you T=.614 s
I'm not sure where to go from there... am I missing an equation that links all of these together?

 

[LowlyPion]

Consider these analogs to linear kinematics:
http://hyperphysics.phy-astr.gsu.edu/hbase/mi.html#rlin

As long as you keep things in radians, and radians/sec etc, you are in good shape.