A tire placed on a balancing machine in a service station starts from rest and turns through 4.93 revolutions in 1.47 s before reaching its final angular speed. Calculate its angular acceleration. It must be in units of radians.

Question

Please help. I have 20 attempts to do this and I have already used 12...each time I do it a different way I get a completely different answer.

Answer 1

V = 4.93revs/1.47s * 6.28rad/rev = 21.1
rad/s = Angular velocity.

V = Vo + a*t
V = 21.1 rad/s.
Vo = 0
t = 1.47 s.
a = rad/s^2
Solve for a.