Rotational Motion?

Question

A tire placed on a balancing machine in a service station starts from rest and turns through 4.7 revolutions in 1.1 s before reaching its final angular speed. Calculate its angular acceleration.
____rad/s2

Answer 1

This is exactly like translational acceleration except that you need to convert revolutions to radians. So:
(translation)
x = at^2/2; a = 2x/t^2
(rotation)
Θ = αt^2/2; α = 2Θ/t^2 (Θ in rad, α in rad/s^2)