A bicycle wheel is accelerating at the constant rate of 1.4 rev/s2

Question

(a) If it starts from rest, what is the rotational velocity after 4.7s?
(b) Through how many revolutions does it turn in this time?

Answer 1

a.) (1.4)(4.7)=6.58 rev/s

b.) half of 6.58 is the average rev/s as it is constant acceleration so
(3.29)(4.7)=15.463 revolutions