A tire placed on a balancing machine in a service station starts from rest and turns through 4.9 revolutions in 1.0 s before reaching its final angular speed. Calculate its angular acceleration.
I need my answer in
1rev= 2n rad
The Attempt at a Solution
Converted rev/s to rad/s
4.9rev/s * (2n rad/s)/ 1 rev= 30.7876 rad/s
a= (30.7876 rad/s)/ 1sec => 30.7876 rad/s^2
This answer comes out wrong.
What am I doing wrong?